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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Metribuzin


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

Metribuzin is an herbicide used primarily on soybeans, potatoes and alfalfa.

 
Detected
Found above
health guidelines
Found above
legal limit
States
9
-
-
Water utilities
10
-
-
People Served
737,088
-
-

Health Concerns for Metribuzin:


Metribuzin Exposure by State

Water utilities in 9 states have reported detecting Metribuzin in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Metribuzin contamination
SystemsPopulation
Ohio1380,000
Delaware1201,000
California1103,414
Nebraska124,889
Maine121,500
Missouri14,800
New York21,150
Maryland1184
Washington1151
Total10737,088

The Most Polluted Communities

10 water utilities reported detecting Metribuzin in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Metribuzin level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Iroquois Job Corps Center
Medina, NY
3501 of 11 ppb
(1 ppb)
2City of Kearney
Kearney, NE
24,8895 of 350.14 ppb
(0 to 2.37 ppb)
3Savannah
Savannah, MO
4,8001 of 170.09 ppb
(0 to 1.53 ppb)
4Skyline Acres Inc
Moses Lake, WA
1511 of 10.08 ppb
(0.08 ppb)
5Kennebec Water District
Waterville, ME
21,5001 of 10.06 ppb
(0.06 ppb)
6Luke / Newpage Luke Mill
Luke, MD
1843 of 110.05 ppb
(0 to 0.2 ppb)
7Rancho California Water District
Temecula, CA
103,4141 of 370.03 ppb
(0 to 1.1 ppb)
8Mcwa, Genesee West
Rochester, NY
8001 of 40.02 ppb
(0 to 0.07 ppb)
9City of Toledo Division of Water
Toledo, OH
380,0001 of 160.01 ppb
(0 to 0.21 ppb)
10Artesian Water Company
Newark, DE
201,0001 of 73< 0.01 ppb
(0 to 0.33 ppb)

Health Based Limits for Metribuzin

StandardDescriptionLevel
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.70 ppb
Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.90 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.350 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5000 ppb

Testing Summary for Metribuzin

Are tests routinely required for Metribuzin by federal law?No
Water suppliers reporting tests for Metribuzin (2004-2009):13,649 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.4 per year

Endocrine disruption

Type of concern: Reference:
Human disruptor - strong evidence European Commission on Endocrine Disruption
Limited evidence of endocrine disruption Japanese National Institute of Health Sciences, 1997
endocrine - weight of evidence unknown/unassessed/unreview: published lit review or major tox study Illinois EPA Chemicals Associated with Endocrine System
endocrine - weight of evidence unknown/unassessed/unreview: published lit review or major tox study Our Stolen Future Endocrine Disruptors

Occupational hazards

Type of concern: Reference:
Allowed workplace exposures restricted to low doses European Union - Classification & Labelling
Allowed workplace exposures restricted to moderate doses RTECS®- TLV/BEI,2007

Developmental/reproductive toxicity

Type of concern: Reference:
Limited evidence of developmental toxicity US EPA, 1788

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Classified as toxic or harmful European Union - Classification & Labelling
Limited evidence of gastrointestinal or liver toxicity US EPA, 1788
Limited evidence of kidney toxicity US EPA, 1788
One or more animal studies show classified as toxic effects at moderate doses (low dose studies may be unavailable for this ingredient) EPA Toxic Release Inventory PBTs

Cancer

Type of concern: Reference:
Cancer - not classifiable/not likely to be human carcinogen EPA Integrated Risk Information System (IRIS)

Ecotoxicology

Type of concern: Reference:
Wildlife and environmental toxicity European Union - Classification & Labelling
Wildlife and environmental toxicity Illinois EPA Chemicals Associated with Endocrine System



Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
European Union - Classification & LabellingMETRIBUZIN•Harmful
•Harmful if swallowed
•Dangerous for the environment
•Very toxic to aquatic organisms
Illinois EPA Chemicals Associated with Endocrine SystemMETRIBUZIN•EPA: suspected endocrine disruptor
EPA Integrated Risk Information System (IRIS)METRIBUZIN•Group D: Not classifiable as to human carcinogenicity (EPA classification)
European Commission on Endocrine DisruptionMETRIBUZINHH-CAT1;WF-CAT3b
National Library of Medicine HazMapMETRIBUZIN•TLV (ACGIH) - Threshold limit value (ACGIH): 5 mg/m3;
Our Stolen Future Endocrine DisruptorsMETRIBUZIN
EPA Toxic Release Inventory PBTsMETRIBUZIN•Toxic, U.S. Environmental Protection Agency Toxics Release Inventory programs
US EPA, 1788METRIBUZIN•Gastrointestinal or liver toxicity hazards: suspected
US EPA, 1788METRIBUZIN•Kidney toxicity hazards: suspected
US EPA, 1788METRIBUZIN•Developmental toxicity hazards: suspected
Japanese National Institute of Health Sciences, 1997METRIBUZIN•Endocrine toxicity hazards: suspected
RTECS®- TLV/BEI,2007METRIBUZIN• occupationally related - ACGIH TLV (human TWA)



references

government/industry list/academic study reference
European Union - Classification & LabellingCPS&Q (Consumer Products Safety & Quality) formely known as ECB (European Chemicals Bureau). 2008. Classification and Labelling: Chemicals: Annex VI of Directive 67/548/EEC through the 31st ATP.
Illinois EPA Chemicals Associated with Endocrine SystemIllinois EPA (Illinois Environmental Protection Agency). 2000. Preliminary list of chemicals associated with endocrine system effects in animals and humans (*) or in vitro (+). In EPA (U.S. Environmental Protection Agency) 2000. Handbook for Non-Cancer Health Effects Valuation, Appendix C.
EPA Integrated Risk Information System (IRIS)EPA (U.S. Environmental Protection Agency). 2008. Integrated Risk Information System (IRIS). Evidence for human carcinogenicity based on 1986-2005 guidelines.
European Commission on Endocrine DisruptionEU (European Union)- Strategy for Endocrine Disrupters 2007. Commision on endocrin disruption requested by the European Parliament in 1998.
National Library of Medicine HazMapNLM (National Library of Medicine). 2006. HazMap — Occupational Exposure to Hazardous Agents.
Our Stolen Future Endocrine DisruptorsColborn T, D Dumanoski, JP Myers. 2006. Widespread Pollutants with Endocrine-disrupting Effects. Updated from original listing in "Our Stolen Future" (1996).
EPA Toxic Release Inventory PBTsEPA (U.S. Environmental Protection Agency). 1999. Toxics Release Inventory Program. PBT Chemical Rule.
Scorecard.org Toxicity InformationUS EPA. Addition of Certain Chemicals; Toxic Chemical Release Reporting; Community Right to Know. Proposed and Final Rules. 59 Federal Register 1788 (Jan 12, 1994); 59 Federal Register 61432 (November 30, 1994). Summarized in Hazard Information on Toxic Chemicals Added to EPCRA Section 313 Under Chemical Expansion. http://www.epa.gov/tri/chemical/hazard_cx.htm
Scorecard.org Toxicity InformationUS EPA. Addition of Certain Chemicals; Toxic Chemical Release Reporting; Community Right to Know. Proposed and Final Rules. 59 Federal Register 1788 (Jan 12, 1994); 59 Federal Register 61432 (November 30, 1994). Summarized in Hazard Information on Toxic Chemicals Added to EPCRA Section 313 Under Chemical Expansion. http://www.epa.gov/tri/chemical/hazard_cx.htm
Scorecard.org Toxicity InformationUS EPA. Addition of Certain Chemicals; Toxic Chemical Release Reporting; Community Right to Know. Proposed and Final Rules. 59 Federal Register 1788 (Jan 12, 1994); 59 Federal Register 61432 (November 30, 1994). Summarized in Hazard Information on Toxic Chemicals Added to EPCRA Section 313 Under Chemical Expansion. http://www.epa.gov/tri/chemical/hazard_cx.htm, Proposition 65 List of Carcinogens (July 2004) can be obtained from http://www.oehha.ca.gov/prop65/prop65_list/Newlist.html.-PEND
Scorecard.org Toxicity InformationJapanese National Institute of Health Sciences. Lists of Paradigmatic Chemicals. http://www.nihs.go.jp/hse/endocrine-e/paradigm/paradigm.html, Keith, L.H. (ed.). Environmental Endocrine Disruptors. John Wiley & Sons, NY. 1997. http://www.wileyeurope.com/cda/product/0,,0471191450%7Cdesc%7C3037,00.html, World Wildlife Fund. Our Stolen Future. Widespread Pollutants with Endocrine-disrupting Effects. http://www.ourstolenfuture.org/Basics/chemlist.htm. The WWF list is derived from references detailed at http://www.ourstolenfuture.org/Sources/chemsources.htm and was originally published in: Colborn, T., F.S. vom Saal, and A.M. Soto. Developmental Effects of Endocrine-Disrupting Chemicals In Wildlife and Humans. Environmental Health Perspectives 101(5): 378-384. 1993.
RTECS®- TLV/BEI,2007RTECS®- TLV/BEI,2007

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