National Water-Quality Assessment (NAWQA) Program

Source Water-Quality Assessment (SWQA) Program

Additional Links

HBSL (Health-Based Screening Level) Web Site

NAWQA

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AWWA - The Water Library

Compounds monitored

About 280 compounds were analyzed in Source Water-Quality Assessment (SWQA) studies. The anthropogenic organic compounds for SWQA studies were categorized into the following 13 compound groups on the basis of their primary use or source: (1) disinfection by-products; (2) fumigant-related compounds; (3) fungicides; (4) gasoline hydrocarbons, oxygenates, and oxygenate degradates; (5) herbicides and herbicide degradates; (6) insecticides and insecticide degradates; (7) manufacturing additives; (8) organic synthesis compounds; (9) pavement- and combustion-derived compounds; (10) personal-care and domestic-use products; (11) plant- or animal-derived biochemicals; (12) refrigerants and propellants; and (13) solvents.

[USGS, U.S. Geological Survey; CAS number, Chemical Abstracts Service Registry Number; --, no additional information]

*This Web site contains CAS Registry Numbers^®, which is a Registered Trademark of the American Chemical Society. CAS recommends the verification of the CASRNs through CAS Client Services^SM

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Disinfection by-products
SH2020	Bromodichloromethane	75–27–4	Trihalomethane, organic synthesis, fire extinguishers	Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2020	Bromoform	75–25–2	Trihalomethane, solvent, pharmaceutical manufacturing, organic synthesis, fire extinguishers, heavy liquid for mineral separations, reagent for graphite ore extraction	Bender and others, 1999; Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006; Zogorski and others, 2006
SH2020	Chloroform	67–66–3	Trihalomethane, fumigant, solvent, anaerobic degradate of carbon tetrachloride, used in synthesis of refrigerants, extractant, chemical intermediate	Egli and others, 1988; Bender and others, 1999; Scorecard, 2006; Zogorski and others, 2006
SH2020	Dibromochloromethane	124–48–1	Trihalomethane, organic synthesis, chemical intermediate for manufacture of aerosol propellants, refrigerant, pesticides, fire extinguishing agent	Bender and others, 1999; U.S. National Library of Medicine, 2006; Zogorski and others, 2006

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Fumigant-related compounds
SH2020	1,2-Dibromo-3-chloropropane (DBCP)	96–12–8	Organic synthesis, nematocide	Budavari, 1989; Zogorski and others, 2006
SH2020	1,2-Dibromoethane (EDB)	106–93–4	Anti-knock compound in gasoline, former pesticide, solvent, waterproofing preparations, dyes, and pharmaeuticals	Budavari, 1989; National Oceanic and Atmospheric Administration, 2005; Scorecard, 2006; U.S. National Library of Medicine, 2006; Zogoski and others, 2006
SH2020	1,2-Dichloropropane	78–87–5	Dry-cleaning solvent, chemical intermediate, stain remover	Budavari, 1989, 1996; Tesoriero and others, 2001; Zogorski and others, 2006
SH2020	1,3-Dichloropropane	142–28–9	Fumigant contaminant	Bender and others, 1999
SH2020	1,4-Dichlorobenzene (p-dichlorobenzene)	106–46–7	Deodorizer, moth killer, manufacture of dyes, chemical intermediate	Bender and others, 1999; Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006
SH2020	2,2-Dichloropropane	594–20–7	Fumigant contaminant	Cohen and others, 1983; Bender and others, 1999
SH2020	cis-1,3-Dichloropropene	10061–01–5	Solvent, chemical intermediate	Bender and others, 1999; Zogorski and others, 2006
SH2020	trans-1,3-Dichloropropene	10061–02-6	Solvent, chemical intermediate	Bender and others, 1999; Zogorski and others, 2006
SH2020	Bromomethane (methyl bromide)	74–83–9	Solvent, chemical intermediate	Bender and others, 1999; Zogorski and others, 2006

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Fungicides
SH2060	Benomyl	17804–35–2	--	Furlong and others, 2001; Wood, 2006
SH2060	Chlorothalonil	1897–45–6	--	Furlong and others, 2001
SH2003	Iprodione	36734–19–7	--	Sandstrom and others, 2001; Wood, 2006
SH2003	Metalaxyl	57837–19–1	--	Furlong and others, 2001; Glassmeyer and others, 2005; Wood, 2006
SH2003	Myclobutanil	88671–89–0	--	Sandstrom and others, 2001: Wood, 2006
SH1433	Pentachlorophenol	87–86–5	Wood preservative, herbicide, insecticide, plant growth regulator	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; Wood, 2006
SH2060	Propiconazole	60207–90–1	--	Furlong and others, 2001; Wood, 2006

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Gasoline hydrocarbons, oxygenates, and oxygenate degradates
SH2020	1,2,3,4-Tetramethylbenzene	488–23–3	Petroleum hydrocarbon	Cozzarelli and others, 1994
SH2020	1,2,3,5-Tetramethylbenzene	527–53–7	Petroleum hydrocarbon	Cozzarelli and others, 1990
SH2020	1,2,3-Trimethylbenzene	526–73–8	Gasoline hydrocarbon, pesticide adjuvant	Wiedemeier and others, 1996; U.S. Environmental Protection Agency, 2006b
SH2020	1,2,4-Trimethylbenzene	95–63–6	Petroleum hydrocarbon, pesticide adjuvant, chemical intermediate	Cozzarelli and others, 1990; Wiedemeier and others, 1996; U.S. Environmental Protection Agency, 2006b; U.S. National Library of Medicine, 2006
SH2020	1,3,5–Trimethylbenzene	108–67–8	Used in synthesis of Ethanox 330, gasoline hydrocarbon	Wiedemeier and others, 1996; U.S. National Library of Medicine, 2006
SH2020	1-Ethyl-2-methylbenzene	611–14–3	Petroleum hydrocarbon	Cozzarelli and others, 1990; Zogorski and others, 2006
SH1433	1-Methylnaphthalene	90–12–0	Polynuclear aromatic hydrocarbon, pesticide adjuvant, wall coverings, gasoline and diesel fuel component	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH1433	2,6-Dimethylnaphthalene	581–42–0	Polynuclear aromatic hydrocarbon, diesel fuel component, pesticide adjuvant, insecticide	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH1433	2-Methylnaphthalene	91–57–6	Polynuclear aromatic hydrocarbon, pesticide adjuvant, sealants, adhesives, wall coverings, gasoline and diesel fuel component	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	Benzene	71–43–2	Gasoline hydrocarbon, organic synthesis	Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2020	Diisopropyl ether (DIPE)	108–20–3	Gasoline oxygenate, solvent	Bender and others, 1999
SH2020	Ethyl tert-butyl ether (ETBE)	637–92–3	Gasoline oxygenate	Bender and others, 1999
SH2020	Ethylbenzene	100–41–4	Gasoline hydrocarbon, organic synthesis, solvent, pesticide adjuvant	Bender and others, 1999; U.S. National Library of Medicine, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	Isopropylbenzene	98–82–8	Organic synthesis, building materials, solvent, gasoline hydrocarbon, intermediate in production of plastics	Bender and others, 1999; Glassmeyer and others, 2005
SH2020	m- & p-Xylene	106–42–3;	Gasoline hydrocarbon, solvent, organic synthesis	U.S. National Library of Medicine, 2006; Zogorski and others, 2006
SH2020	m- & p-Xylene	108–38–3	Gasoline hydrocarbon, solvent, organic synthesis
SH2020	Methyl tert-butyl ether (MTBE)	1634–04–4	Gasoline oxygenate	Bender and others, 1999
SH2020	Naphthalene	91–20–3	Polynuclear aromatic hydrocarbon, petroleum hydrocarbon, pesticide adjuvant, combustion product, disinfectant, antiseptic, mouthwash, throat lozenges, slimicides, manufacture of synthetic fibers, fumigant, moth repellant	Bender and others, 1999; Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006
SH2020	n-Butylbenzene	104–51–8	Solvent, organic synthesis	Bender and others, 1999; U.S. National Library of Medicine, 2006; Zogorski and others, 2006
SH2020	o-Xylene	95–47–6	Gasoline hydrocarbon, pesticide adjuvant, organic synthesis, solvent	Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2020	p-Isopropyltoluene (p-cymene)	99–87–6	Organic synthesis, solvent, heat transfer agent, wood office furniture	Bender and others, 1999; Scorecard, 2006; U.S. National Library of Medicine, 2006
SH2020	sec-Butylbenzene	135–98–8	Gasoline hydrocarbon, solvent, organic synthesis, plasticizer	Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2020	Styrene	100–42–5	Organic synthesis, manufacture of styrofoam, building materials, adhesives	Bender and others, 1999; Scorecard, 2006; U.S. National Library of Medicine, 2006; Zogorski and others, 2006
SH4024	tert-Amyl alcohol (2-methyl-2-butanol)	75–85–4	Gasoline oxygenate	U.S. Geological Survey, 2007
SH2020	tert-Amyl methyl ether (TAME)	994–05–8	Gasoline oxygenate	Bender and others, 1999
SH4024	tert-Butyl alcohol	75–65–0	Gasoline oxygenate; methyl tert-butyl ether (MTBE) degradate	Pankow and others, 1996; Bradley and others, 2001; U.S. Geological Survey, 2007
SH2020	tert-Butylbenzene	98–06–6	Organic synthesis	Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2020	Toluene	108–88–3	Solvent consumer products, pesticide adjuvant	Bender and others, 1999; U.S. Environmental Protection Agency, 2006b

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Herbicides and herbicide degradates
SH2060	2,4–D	94-75–7	--	Furlong and others, 2001
SH2060	2,4–D methyl ester	1928–38–7	--	Furlong and others, 2001
SH2060	2,4–DB	94–82–6	--	Furlong and others, 2001
SH2003	2,6-Diethylaniline	579–66–8	Herbicide (mostly alachlor) degradate	Zaugg and others, 1995; Hladik and others, 2005
SH2003	2-Chloro-2,6-diethylacetanilide	6967–29–9	Herbicide (mostly alachlor) degradate	Sandstrom and others, 2001; Hladik and others, 2005
SH2003	2-Ethyl-6-methylaniline	24549–06–2	Herbicide (acetochlor or metolachlor) degradate	Sandstrom and others, 2001; Hladik and others, 2005
SH2060	2-Hydroxyatrazine	2163–68–0	Herbicide (atrazine) degradate	Furlong and others, 2001
SH2060	3(4-Chlorophenyl)-1-methyl urea	5352–88–5	Herbicide degradate	Furlong and others, 2001
SH2003	3,4-Dichloroaniline	95–76–1	Herbicide (diuron) degradate	Sandstrom and others, 2001
SH2003	4-Chloro-2-methylphenol	1570–64–5	Herbicide (MCPA) degradate	Sandstrom and others, 2001
SH2003	Acetochlor	34256–82–1	--	Lee and Strahan, 2003
LCPD	Acetochlor ethane sulfonic acid (ESA)	--	Herbicide (acetochlor) degradate	Lee and Strahan, 2003
LCPD	Acetochlor oxanilic acid	--	Herbicide (acetochlor) degradate	Lee and Strahan, 2003
LCPD	Acetochlor sulfynilacetic acid	--	Herbicide (acetochlor) degradate	Lee and Strahan, 2003
LCPD	Acetochlor/metolachlor ethane sulfonic acide (ESA) 2nd Amide	--	Herbicide (acetochlor or metolachlor) degradate	Lee and Strahan, 2003
SH2060	Acifluorfen	50594–66–6	--	Furlong and others, 2001
SH2003	Alachlor	15972–60–8	--	Zaugg and others, 1995
LCPD	Alachlor ethane sulfonic acid (ESA) 2nd amide	--	Herbicide (alachlor) degradate	Lee and Strahan, 2003
LCPD	Alachlor ethane sulfonic acid (ESA)	--	Herbicide (alachlor) degradate	Lee and Strahan, 2003
LCPD	Alachlor oxanilic acid	--	Herbicide (alachlor) degradate	Lee and Strahan, 2003
LCPD	Alachlor sulfynilacetic acid	140939–16–8	Herbicide (alachlor) degradate	Lee and Strahan, 2003
SH2003	Atrazine	1912–24–9	--	Zaugg and others, 1995; Glassmeyer and others, 2005
SH2003	Benfluralin	1861–40–1	--	Zaugg and others, 1995
SH2060	Bensulfuron-methyl	83055–99–6	--	Furlong and others, 2001
SH2060	Bentazon	25057–89–0	--	Furlong and others, 2001
SH2060	Bromacil	314–40–9	--	Furlong and others, 2001; Glassmeyer and others, 2005
SH2060	Bromoxynil	1689–84–5	--	Furlong and others, 2001
SH2060	Chloramben, methyl ester	7286–84–2	--	Furlong and others, 2001
SH2060	Chlorimuron-ethyl	90982–32–4	--	Furlong and others, 2001
SH2060	Clopyralid	1702–17–6	--	Furlong and others, 2001
SH2060	Cycloate	1134–23–2	--	Furlong and others, 2001
SH2003	Dacthal	1861–32–1	--	Zaugg and others, 1995
SH2060	Dacthal monoacid	887–54–7	Herbicide (dacthal) degradate	Furlong and others, 2001
SH2003	Deethyl atrazine (DEA)	6190–65–4	Herbicide (atrazine) degradate	Zaugg and others, 1995
SH2060	Deethyldeisopropyl-atrazine (DDA)	3397–62–4	Herbicide (atrazine) degradate	Furlong and others, 2001
SH2060	Deisopropylatrazine (DIA)	1007–28–9	Herbicide (atrazine) degradate	Furlong and others, 2001
SH2060	Dicamba	1918–00–9	--	Furlong and others, 2001
SH2060	Dichlorprop	120–36–5	--	Furlong and others, 2001
LCPD	Dimethenamid	87674–68–8	--	Lee and Strahan, 2003
LCPD	Dimethenamid ethane sulfonic acid (ESA)	--	Herbicide (dimethenamid ) degradate	Lee and Strahan, 2003
LCPD	Dimethenamid oxanilic acid	--	Herbicide (dimethenamid ) degradate	Lee and Strahan, 2003
SH2060	Dinoseb	88–85–7	Plant growth regulator	Furlong and others, 2001
SH2060	Diphenamid	957–51–7	--	Furlong and others, 2001
SH2060	Diuron	330–54–1	--	Furlong and others, 2001
SH2060	Fenuron	101–42–8	--	Furlong and others, 2001
LCPD	Flufenacet	142459–58–3	--	Lee and Strahan, 2003
LCPD	Flufenacet ethane sulfonic acid (ESA)	--	Herbicide (flufenacet) degradate	Lee and Strahan, 2003
LCPD	Flufenacet oxanilic acid	--	Herbicide (flufenacet) degradate	Lee and Strahan, 2003
SH2060	Flumetsulam	98967–40–9	--	Furlong and others, 2001
SH2060	Fluometuron	2164–17–2	--	Furlong and others, 2001
SH2003	Hexazinone	51235–04–2	--	Sandstrom and others, 2001
SH2060	Imazaquin	81335–37–7	--	Furlong and others, 2001
SH2060	Imazethapyr	81335–77–5	--	Furlong and others, 2001
SH2060	Linuron	330–55–2	--	Furlong and others, 2001
SH2060	MCPA	94–74–6	--	Furlong and others, 2001
SH2060	MCPB	94–81–5	--	Furlong and others, 2001
SH2003	Metolachlor	51218–45–2	--	Zaugg and others, 1995; Glassmeyer and others, 2005
LCPD	Metolachlor ethane sulfonic acid (ESA)	--	Herbicide (metolachlor) degradate	Lee and Strahan, 2003
LCPD	Metolachlor oxanilic acid	--	Herbicide (metolachlor) degradate	Lee and Strahan, 2003
SH2003	Metribuzin	21087–64–9	--	Zaugg and others, 1995
SH2060	Metsulfuron methyl	74223–64–6	--	Furlong and others, 2001
SH2060	Neburon	555–37–3	--	Furlong and others, 2001
SH2060	Nicosulfuron	111991–09–4	--	Furlong and others, 2001
SH2060	Norflurazon	27314–13–2	--	Furlong and others, 2001
SH2060	Oryzalin	19044–88–3	--	Furlong and others, 2001
SH2003	Pendimethalin	40487–42–1	--	Zaugg and others, 1995
SH2060	Picloram	1918-02-1	--	Furlong and others, 2001
SH2003	Prometon	1610–18–0	--	Zaugg and others, 1995; Glassmeyer and others, 2005
SH2003	Prometryn	7287–19–6	--	Sandstrom and others, 2001
LCPD	Propachlor	1918–16–7	--	Lee and Strahan, 2003
LCPD	Propachlor ethane sulfonic acid (ESA)	--	Herbicide (propachlor) degradate	Lee and Strahan, 2003
LCPD	Propachlor oxanilic acid	--	Herbicide (propachlor) degradate	Lee and Strahan, 2003
SH2060	Propham	122–42–9	--	Furlong and others, 2001
SH2003	Propyzamide	23950–58–5	--	Zaugg and others, 1995
SH2060	Siduron	1982–49–6	--	Furlong and others, 2001
SH2003	Simazine	122–34–9	--	Zaugg and others, 1995
SH2060	Sulfometuron-methyl	74222–97–2	--	Furlong and others, 2001
SH2060	Tebuthiuron	34014–18–1	--	Furlong and others, 2001
SH2060	Terbacil	5902–51–2	--	Furlong and others, 2001
SH2003	Terbuthylazine	5915–41–3	--	Sandstrom and others, 2001
SH2060	Triclopyr	55335–06–3	--	Furlong and others, 2001
SH2003	Trifluralin	1582–09–8	--	Zaugg and others, 1995

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Insecticides and insecticide degradates
SH2003	1-Naphthol	90–15–3	Herbicide (napropamide) and insecticide (carbaryl) degradate	Sandstrom and others, 2001
SH2060	3-Hydroxycarbofuran	16655–82–6	Insecticide (carbofuran) degradate	Furlong and others, 2001
SH2060	3-Ketocarbofuran	16709–30–1	Insecticide (carbofuran) degradate	Furlong and others, 2001
SH2060	Aldicarb	116–06–3	--	Furlong and others, 2001
SH2060	Aldicarb sulfone	1646–88–4	Insecticide (aldicarb) degradate	Furlong and others, 2001
SH2060	Aldicarb sulfoxide	1646–87–3	Insecticide (aldicarb) degradate	Furlong and others, 2001
SH2003	Azinphos-methyl	86–50–0	--	Zaugg and others, 1995
SH2003	Azinphos-methyl-oxon	961–22–8	Insecticide (azinphos-methyl) degradate	Sandstrom and others, 2001
SH2060	Bendiocarb	22781–23–3	--	Furlong and others, 2001
SH2060	Carbaryl	63–25–2	--	Furlong and others, 2001; Glassmeyer and others, 2005
SH2060	Carbofuran	1563–66–2	--	Furlong and others, 2001
SH2003	Chlorpyrifos	2921–88–2	--	Zaugg and others, 1995; Glassmeyer and others, 2005
SH2003	Chlorpyrifos, oxygen analog	5598–15–2	Insecticide (chlorpyrifos) degradate	Sandstrom and others, 2001
SH2003	cis-Permethrin	54774–45–7	--	Zaugg and others, 1995
SH2003	Cyfluthrin	68359–37–5	--	Sandstrom and others, 2001
SH2003	Cypermethrin	52315–07–8	--	Sandstrom and others, 2001
SH2003	Desulfinylfipronil	--	Insecticide (fipronil) degradate	Madsen and others, 2003
SH2003	Desulfinylfipronil amide	--	Insecticide (fipronil) degradate	Madsen and others, 2003
SH2003	Diazinon	333–41–5	--	Zaugg and others, 1995; Sandstrom and others, 2001; Glassmeyer and others, 2005
SH2003	Diazinon, oxygen analog	962–58–3	Insecticide (diazinon) degradate	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Dichlorvos	62–73–7	--	Zaugg and others, 1995; Sandstrom and others, 2001; Glassmeyer and others, 2005
SH2003	Dicrotophos	141–66–2	--	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Dieldrin	60–57–1	--	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Dimethoate	60–51–5	--	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Ethion	563–12–2	--	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Ethion monoxon	17356–42–2	Insecticide (ethion) degradate	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Fenamiphos	22224–92–6	--	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Fenamiphos sulfone	31972–44–8	Insecticide (fenamiphos) degradate	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Fenamiphos sulfoxide	31972–43–7	Insecticide (fenamiphos) degradate	Zaugg and others, 1995; Sandstrom and others, 2001
SH2003	Fipronil	120068–37–3	--	Madsen and others, 2003
SH2003	Fipronil sulfide	120067–83–6	Insecticide (fipronil) degradate	Madsen and others, 2003
SH2003	Fipronil sulfone	120068–36–2	Insecticide (fipronil) degradate	Madsen and others, 2003
SH2003	Fonofos	944–22–9	--	Zaugg and others, 1995
SH2003	Fonofos, oxygen analog	944–21–8	Insecticide (fonofos) degradate	Sandstrom and others, 2001
SH2060	Imidacloprid	138261–41–3	--	Furlong and others, 2001
SH2003	Isofenphos	25311–71–1	--	Sandstrom and others, 2001
SH2003	Malaoxon	1634–78–2	Insecticide (malathion) degradate	Sandstrom and others, 2001
SH2003	Malathion	121–75–5	--	Zaugg and others, 1995
SH2003	Methidathion	950–37–8	--	Sandstrom and others, 2001
SH2060	Methiocarb	2032–65–7	--	Furlong and others, 2001
SH2060	Methomyl	16752–77–5	--	Furlong and others, 2001
SH2060	Oxamyl	23135–22–0	--	Furlong and others, 2001
SH2003	Paraoxon-methyl	950–35–6	Insecticide (methyl parathion) degradate	Sandstrom and others, 2001
SH2003	Parathion-methyl	298–00–0	--	Zaugg and others, 1995
SH2003	Phorate	298–02–2	--	Zaugg and others, 1995
SH2003	Phorate oxon	2600–69–3	Insecticide (phorate) degradate	Sandstrom and others, 2001
SH2003	Phosmet	732–11–6	--	Sandstrom and others, 2001
SH2003	Phosmet oxon	3735–33–9	Insecticide (phosmet) degradate	Sandstrom and others, 2001
SH2060	Propoxur	114–26–1	--	Furlong and others, 2001
SH2003	Terbufos	13071–79–9	--	Zaugg and others, 1995
SH2003	Terbufos-oxygen-analogue sulfone	56070–15–6	Insecticide (terbufos) degradate	Sandstrom and others, 2001

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Manufacturing additives
SH1433	5–Methyl-1H-benzotriazole	136–85–6	Corrosion inhibitor in de-icers/antifreeze, anti-fading agent for metals, antiseptic and anticoagulant agent, anti-fog for photography, ultraviolet-absorbers, photoconductor, copying systems, pharmaceuticals, pesticide products and other specialty chemicals, antioxidant	Zaugg and others, 2002; Glassmeyer and others, 2005; Chemicalland21, 2007
SH1433	Bisphenol A	80–05–7	Used in manufacture of plastic and polycarbonate resins	Zaugg and others, 2002; Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006
SH1433	Tri(2-butoxyethyl)phosphate	78–51–3	Plasticizer, pesticide adjuvant, flame retardant	Zaugg and others, 2002; Glassmeyer and others, 2005; U.S. Environmental Protection Agency, 2006b
SH1433	Tri(2-chloroethyl)phosphate	115–96–8	Flame retardant, fire resistant cellulose plasticizer	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Tributyl phosphate	126–73–8	Antifoaming agent and flame retardant	Zaugg and others, 2002
SH1433	Triphenyl phosphate	115–86–6	Plasticizer, flame retardant	Budavari, 1989; Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Tris(dichlorisopropyl) phosphate	13674–87–8	Flame retardant, plasticizer	Zaugg and others, 2002; Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Organic synthesis compounds
SH2020	1,1-Dichloropropene	563–58–6	Solvent (pharmaceuticals)	Bender and others, 1999; Scorecard, 2006
SH2020	1,2,3-Trichlorobenzene	87–61–6	Termiticide, solvent	Budavari, 1989, 1996; Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2020	1,2,3-Trichloropropane	96–18–4	Fumigant contaminant, paint and varnish remover	Agency for Toxic Substances and Disease Registry, 1992a; Tesoriero and others, 2001
SH2020	3-Chloro-1-propene	107–05–1	Fumigant contaminant	Cohen and others, 1983; U.S. National Library of Medicine, 2006
SH2020	Acrylonitrile	107–13–1	Fumigant, pesticide	Bender and others, 1999; Scorecard, 2006
SH1433	Anthraquinone	84–65–1	Bird repellant, serves as the basis for the production of a large number of acid and base dyes, vat dyes, disperse dyes, and reactive dyes additive in the soda and kraft chemical alkaline pulping processes in the paper pulping industry	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. National Library of Medicine, 2006
SH1433	Carbazole	86–74–8	Synthesis of dyes, combustion product	Budavari, 1989; Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006
SH2020	Carbon disulfide	75–15–0	Solvent, syntheses, fumigant, sulfate-reduction product	Budavari, 1989; Megonigal and others, 2004; Scorecard, 2006
SH2020	Chloromethane	74–87–3	Blowing agent/propellant, solvent, refrigerant	Budavari, 1989; U.S. National Library of Medicine, 2006
SH2020	Ethyl methacrylate (ethyl 2-methyl-2-propanoate)	97–63–2	Hairspray, used to make polymers, chemical intermediate	Scorecard, 2006; U.S. National Library of Medicine, 2006
SH2020	Hexachlorobutadiene	87–68–3	Used in rubber manufacture, solvent, pesticide (non-U.S.)	Bender and others, 1999; California Environmental Protection Agency, 1999
SH2020	Iodomethane	74–88–4	Microscopy, circuit board manufacture, fire extinguishers, proposed fumigant	Budavari, 1989; U.S. Environmental Protection Agency, 2006c
SH2020	Methyl acrylate (methyl-2-propenoate)	96–33–3	Manufacture of resins, paper, plastic	Budavari, 1989; U.S. National Library of Medicine, 2006
SH2020	Methyl acrylonitrile (2-methyl-2-propenenitrile)	126–98–7	Organic synthesis, polymer manufacture, chemical intermediate	Budavari, 1989; United Nations Environmental Programme, 2002; U.S. National Library of Medicine, 2006
SH2020	Methyl methacrylate (methyl 2-methyl-2-propenoate)	80–62–6	Manufacture of paint, paper, acrylic, chemical intermediate, pesticide adjuvant	U.S. National Library of Medicine, 2006; U.S. Environmental Protection Agency, 2006b; Spectrum Laboratories Inc., 2007
SH2020	trans-1,4-Dichloro-2-butene	110–57–6	Chemical intermediate	U.S. National Library of Medicine, 2006
SH2020	Vinyl bromide	593–60–2	Plastic manufacture, 1,2-dibromoethane degradate, flame retardant	Barbash and Reinhard, 1989; Bender and others, 1999
SH2020	Vinyl chloride	75–01–4	Polyvinyl chloride (PVC) manufacture, refrigerant, degradate of 1,2-dichloroethane (aerobic) and dichloroethylene (anaerobic)	Vogel and McCarty, 1985; Barbash and Reinhard, 1989; Bender and others, 1999;

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Pavement- and combustion-derived compounds
SH1433	Anthracene	120–12–7	Polynuclear aromatic hydrocarbon, used in dye production and production of plastic fibers, organic synthesis (anthraquinone), wood preservative	Lee and Strahan, 2003; Glassmeyer and others, 2005
SH1433	Benzo[a]pyrene	50–32–8	Polynuclear aromatic hydrocarbon, cancer research chemical	Zaugg and others, 2002, Glassmeyer and others, 2005
SH1433	Fluoranthene	206–44–0	Polynuclear aromatic hydrocarbon, used on inside lining on iron water pipes and tanks, production of fluorescent dyes and pharmaceuticals, component of coal tar and asphalt	Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006
SH1433	Phenanthrene	85–01–8	Polynuclear aromatic hydrocarbon, manufacture of dyes, explosives, and drugs, used in research	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Pyrene	129–00–0	Polynuclear aromatic hydrocarbon, used to synthesize benzo[a]pyrene, used as a starting material in the production of optical brighteners and dyes, research chemical, component of coal tar and asphalt	Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Personal-care and domestic-use products
SH1433	3-tert-Butyl-4-hydroxy anisole (BHA)	25013–16–5	Antioxidant, preservative, food packaging, and rubber and petroleum products	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	4-Cumylphenol	599–64–4	Nonionic detergent metabolite	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	4-n-Octylphenol	1806–26–4	Nonionic detergent metabolite	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	4-tert-Octylphenol	140–66–9	Nonionic detergent metabolite	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Acetophenone	98–86–2	Fragrance, flavorant, solvent for paint and varnish removal, plastics and resins	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. National Library of Medicine, 2006
SH1433	Acetyl hexamethyl tetrahydronaphthalene (AHTN)	21145–77–7	Widely used musk fragrance	Zaugg and others, 2002
SH1433	Benzophenone	119–61–9	Fixative in perfumes and soaps, hair mousse, inks, organic synthesis	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. National Library of Medicine, 2006
SH2020	Bromochloromethane	74–97–5	Fire extinguishing fluid, intermediate in pesticide manufacturing	Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2060	Caffeine	58–08–2	Beverage ingredient, diuretic	Furlong and others, 2001; Glassmeyer and others, 2005
SH1433	Camphor	76–22–2	Flavorant and odorant, used in manufacture of plastics, as plasticizer for cellulose esters and ethers, in lacquers and varnishes, in explosives, in pyrotechnics, in embalming fluid, in manufacture of cymene, in camphorated parachlorophenol, paregoric, and flexible collodion	Budavari, 1989; Zaugg and others, 2002; U.S. National Library of Medicine, 2004; Glassmeyer and others, 2005
SH1433	Cotinine	486–56–6	Primary nicotine metabolite, nonprescription drug	Kolpin and others, 2002; Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	d-Limonene	5989–27–5	Antimicrobial, fragrance	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Hexadydrohexamethyl-cyclopentabenzopyran (HHCB)	1222–05–5	Widely used musk fragrance	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Indole	120–72–9	Pesticide adjuvant, coffee ingredient, fragrance	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH1433	Isoborneol	124–76–5	Flavorant, fragrance, disinfection ingredient	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. National Library of Medicine, 2006
SH1433	Isoquinoline	119–65–3	Flavors and fragrances	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Menthol (5-methyl-2-[1-methylethyl] cyclohexanol)	89–78–1	Cigarettes, cough drops, linament, mouthwash	Zaugg and others, 2002
SH1433	Methyl salicylate	119–36–8	Analgesic, decongestant, toilet and window cleaner	Kolpin and others, 2002; Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006
SH1433	N,N-diethyl-meta-toluamide (DEET)	134–62–3	Insect repellent	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Nonylphenol, diethoxy- (total)	26027–38–2	Nonionic detergent metabolite	Zaugg and others, 2002
SH1433	Octylphenol, diethoxy- (OPEO2)	26636–32–8	Nonionic detergent metabolite	Zaugg and others, 2002
SH1433	Octylphenol, monoethoxy- (OPEO1)	26636–32–8	Nonionic detergent metabolite	Zaugg and others, 2002
SH1433	para-Nonylphenol, total (mixture of isomers)	84852–15–3	Surfactant intermediate	Zaugg and others, 2002; CambridgeSoft Corporation, 2004; Glassmeyer and others, 2005
SH1433	Phenol	108–95–2	Disinfectant	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Triclosan	3380–34–5	Antimicrobial, preservative for cosmetics and detergents preparations	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Triethyl citrate	77–93–0	Cosmetics, pharmaceuticals, plasticizer	Zaugg and others, 2002; Glassmeyer and others, 2005; U.S. National Library of Medicine, 2006

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Plant- or animal-derived biochemicals
SH1433	3-beta-Coprostanol	360–68–9	Fecal indicator (carnivores)	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	3-Methyl-1(H)-indole (Skatole)	83–34–1	In animal waste, stench in feces, in coal tar	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	beta-Sitosterol	83–46–5	Plant sterol	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	beta-Stigmastanol	19466–47–8	Plant sterol	Zaugg and others, 2002; Glassmeyer and others, 2005
SH1433	Cholesterol	57–88–5	Fecal indicator, plant sterol	Zaugg and others, 2002; Glassmeyer and others, 2005

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Refrigerants and propellants
SH2020	1,1,2-Trichloro-1,2,2-trifluoroethane (CFC–113)	76–13–1	Electroplating, degreasing, adhesives, textiles, pesticide adjuvant	Bender and others, 1999; CambridgeSoft Corporation, 2004; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	Dichlorodifluoromethane (CFC–12)	75–71–8	Insulation, inhalers, insecticide, pesticide adjuvant	Bender and others, 1999; CambridgeSoft Corporation, 2004; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	Trichlorofluoromethane (CFC–11)	75–69–4	Hairspray, inhalers, insecticide, pesticide adjuvant	Bender and others, 1999; CambridgeSoft Corporation, 2004; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b

USGS analytical schedule	Compound	CAS number*	Secondary uses or sources	Reference for use and source information
Solvents
SH2020	1,1,1,2-Tetrachloroethane	630–20–6	Solvent for varnish	Bender and others, 1999; Scorecard, 2006
SH2020	1,1,1-Trichloroethane	71–55–6	Electronics, pharm manufacture, degreaser; pesticide adjuvant, fumigant	Bender and others, 1999; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	1,1,2,2-Tetrachloroethane	79–34–5	Manufacture of solvents, insecticide, pesticide adjuvant	Bender and others, 1999; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	1,1,2-Trichloroethane	79–00–5	Aerosol paints, manufacture solvent	Bender and others, 1999; Scorecard, 2006
SH2020	1,1-Dichloroethane	75–34–3	Lubricant, cleaner; anaerobic 1,1,1-trichloroethane degradate	Klecka and others, 1990; Bender and others, 1999; Scorecard, 2006
SH2020	1,1-Dichloroethene	75–35–4	1,1,1-trichloroethane degradate (aerobic); pharm solvent	Haag and Mill, 1988; Bender and others, 1999; Scorecard, 2006
SH2020	1,2,4-Trichlorobenzene	120–82–1	Manufacture of solvents; insecticide	Bender and others, 1999; Scorecard, 2006
SH2020	1,2-Dichlorobenzene (o-dichlorobenzene)	95–50–1	Disinfectant, deodorant, consumer solvent	Bender and others, 1999; Scorecard, 2006
SH2020	1,2-Dichloroethane (ethylene dichloride)	107–06–2	Fumigant, manufacture of solvents, anti-knock compound in gasoline	Bender and others, 1999; National Oceanic and Atmospheric Administration, 2005; Scorecard, 2006
SH2020	1,3-Dichlorobenzene (m-dichlorobenzene)	541–73–1	Organic synthesis, fumigant	Bender and others, 1999
SH2020	2-Chlorotoluene	95–49–8	Pesticide adjuvant	Bender and others, 1999; U.S. Environmental Protection Agency, 2006b
SH2020	2-Hexanone	591–78–6	Organic synthesis	Agency for Toxic Substances and Disease Registry, 1992b; Spectrum Laboratories Inc., 2007
SH2020	4-Chlorotoluene	106–43–4	Pesticide adjuvant	Bender and others, 1999; U.S. Environmental Protection Agency, 2006b
SH2020	Acetone (2-propanone)	67–64–1	Organic synthesis, chemical intermediate, pesticide adjuvant	Budavari, 1989; U.S. Environmental Protection Agency, 2006b
SH2020	Bromobenzene	108–86–1	Organic synthesis, additive to oil	Bender and others, 1999; U.S. National Library of Medicine, 2006
SH2020	Carbon tetrachloride	56–23–5	Fumigant, solvent	Bender and others, 1999; Scorecard, 2006
SH2020	Chlorobenzene	108–90–7	Disinfectant, herbicide, building materials, solvent	Budavari, 1989; Bender and others, 1999; Scorecard, 2006
SH2020	Chloroethane	75–00–3	Refrigerant, anaerobic degradation of 1,1,1-trichloroethane and 1,1-dichloroethane, manufacture of tetraethyl lead	Klecka and others, 1990; Bender and others, 1999; Lorah and Olsen, 1999
SH2020	cis-1,2-Dichloroethene	156–59–2	Trichloroethene degradate (anaerobic)	Bender and others, 1999; Lorah and Olsen, 1999
SH2020	Dibromomethane	74–95–3	Organic synthesis (pesticide manufacture), heavy liquid for mineral separations, fire extinguishers	Bender and others, 1999
SH2020	Diethyl ether (1,1'-oxybisethane)	60–29–7	Detergent, solvent, pharmaceuticals, cosmetics	Budavari, 1989; Scorecard, 2006
SH2020	Hexachloroethane	67–72–1	Lubricant, dry cleaning solvent	Budavari, 1989; Scorecard, 2006
SH1433	Isophorone	78–59–1	Herbicide, adjuvant, solvent	Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b; U.S. National Library of Medicine, 2006
SH4024	Methyl acetate	79–20–9	Aerosol paints	Scorecard, 2006
SH2020	Methyl ethyl ketone (MEK)	78–93–3	Adjuvant, solvent, cleaners, polyvinyl chloride (PVC) glue and primer	Bender and others, 1999; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	Methyl isobutyl ketone (MIBK) (4-methyl-2-pentanone)	108–10–1	Solvent, personal care products, insecticide, pesticide adjuvant, polyvinyl chloride (PVC) glue	Budavari, 1989; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	Methylene chloride	75–09–2	Solvent, personal care products, insecticide, rodenticide, fumigant, dog repellent, anaerobic degradation of carbon tetrachloride, polyvinyl chloride (PVC) glue substitute	Egli and others, 1988; Bender and others, 1999; Scorecard, 2006
SH2020	n-Propylbenzene	103–65–1	Insulation, flooring manufacture	Bender and others, 1999; Scorecard, 2006
SH1433	p-Cresol	106–44–5	Paint/varnish removal, solvent, disinfectant, chemical intermediate for synthetic resins	Budavari, 1989; Zaugg and others, 2002; Glassmeyer and others, 2005; Scorecard, 2006
SH2020	Tetrachloroethene (PCE)	127–18–4	Fumigant, solvent	Bender and others, 1999; Glassmeyer and others, 2005; Scorecard, 2006
SH2020	Tetrahydrofuran (1,4-epoxybutane)	109–99–9	Adjuvant, cleaners, solvent, polyvinyl chloride (PVC) glue and primer	Budavari, 1989; Scorecard, 2006; U.S. Environmental Protection Agency, 2006b
SH2020	trans-1,2-Dichloroethene	156–60–5	Trichloroethene degradate	Bender and others, 1999; Lorah and Olsen, 1999
SH2020	Trichloroethene (TCE)	79–01–6	Fumigant, solvent, anaerobic perchloroethene degradate	Vogel and McCarty, 1985; Bender and others, 1999; Scorecard, 2006

Nineteen additional compounds have been added and are not shown above. These compounds have been analyzed by SWQAs because Schedule 2003 has been replaced by 2033. These compounds include:

[µg/L, microgram per liter]

USGS analytical schedule	Compound	CAS number*	Reporting level in µg/L	Drinking-water benchmark	Primary use or source
USGS analytical schedule	Compound	CAS number*	Reporting level in µg/L	Drinking-water benchmark	Primary use or source
SH2033	3,5-Dichloroaniline	626-43-7	0.012	NA	Herbicides and herbicide degradates
SH2033	alpha-Endosulfan	959-98-8	0.011	NA	Insecticides and insecticide degradates
SH2033	Carbofuran	1563-66-2	0.06	MCL	Insecticides and insecticide degradates
SH2033	cis-Propiconazole	60207-90-1	0.013	HBSL	Fungicides
SH2033	Cyanazine	21725-46-2	0.018	HBSL	Herbicides and herbicide degradates
SH2033	Disulfoton	298-04-4	0.02	HBSL	Insecticides and insecticide degradates
SH2033	Disulfoton sulfone	2497-06-5	0.014	NA	Insecticides and insecticide degradates
SH2033	Endosulfan sulfate	1031-07-8	0.022	NA	Insecticides and insecticide degradates
SH2033	EPTC	759-94-4	0.002	HBSL	Herbicides and herbicide degradates
SH2033	Ethoprophos	13194-48-4	0.012	HBSL	Insecticides and insecticide degradates
SH2033	lambda-Cyhalothrin	91465-08-6	0.014	NA	Insecticides and insecticide degradates
SH2033	Molinate	2212-67-1	0.003	HBSL	Herbicides and herbicide degradates
SH2033	Oxyfluorfen	42874-03-3	0.017	HBSL	Herbicides and herbicide degradates
SH2033	Propanil	709-98-8	0.011	HBSL	Herbicides and herbicide degradates
SH2033	Propargite	2312-35-8	0.02	HBSL	Insecticides and insecticide degradates
SH2033	Tebuconazole	107534-96-3	0.0136	NA	Fungicides
SH2033	Tefluthrin	79538-32-2	0.0033	HBSL	Insecticides and insecticide degradates
SH2033	Thiobencarb	28249-77-6	0.01	HBSL	Herbicides and herbicide degradates
SH2033	trans-Propiconazole	60207-90-1	0.034	HBSL	Fungicides

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Source Water-Quality Assessment (SWQA) Program

Compounds monitored

Disinfection by-products

Fumigant-related compounds

Fungicides

Gasoline hydrocarbons, oxygenates, and oxygenate degradates

Herbicides and herbicide degradates

Insecticides and insecticide degradates

Manufacturing additives

Organic synthesis compounds

Pavement- and combustion-derived compounds

Personal-care and domestic-use products

Plant- or animal-derived biochemicals

Refrigerants and propellants

Solvents

References: