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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Bentazon (Basagran)


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

Bentazon is an herbicide used to control broadleaf weeds for alfalfa, asparagus, cereals, beans and many other crops.

 
Detected
Found above
health guidelines
Found above
legal limit
States
2
-
-
Water utilities
3
-
-
People Served
5,911
-
-

Health Concerns for Bentazon (Basagran):


Bentazon (Basagran) Exposure by State

Water utilities in 2 states have reported detecting Bentazon (Basagran) in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with Bentazon (Basagran) contamination
SystemsPopulation
California25,850
Washington161
Total35,911

The Most Polluted Communities

3 water utilities reported detecting Bentazon (Basagran) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Bentazon (Basagran) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1College Park Mutual Water Company
Penngrove, CA
2501 of 51.24 ppb
(0 to 6.2 ppb)
2Sunset Acres Water Assn
Moses Lake, WA
614 of 60.33 ppb
(0 to 0.79 ppb)
3Calif Correctnl Inst Tehachapi
Tehachapi, CA
5,6001 of 3< 0.01 ppb
(0 to 0.02 ppb)

Health Based Limits for Bentazon (Basagran)

StandardDescriptionLevel
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.200 ppb
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.200 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.200 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.300 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.300 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.1000 ppb

Testing Summary for Bentazon (Basagran)

Are tests routinely required for Bentazon (Basagran) by federal law?No
Water suppliers reporting tests for Bentazon (Basagran) (2004-2009):1,981 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.4 per year

Allergies/immunotoxicity

Type of concern: Reference:
Limited evidence of immune system toxicity or allergies European Union - Classification & Labelling

Occupational hazards

Type of concern: Reference:
Allowed workplace exposures restricted to low doses European Union - Classification & Labelling

Irritation (skin, eyes, or lungs)

Type of concern: Reference:
Classified as irritant European Union - Classification & Labelling

Organ system toxicity (non-reproductive)

Type of concern: Reference:
Classified as toxic or harmful European Union - Classification & Labelling
Classified as not expected to be potentially toxic or harmful Environment Canada Domestic Substance List

Cancer

Type of concern: Reference:
One or more in vitro tests non-mammalian cells show positive mutation results RTECS®- Mutation Research 2004
Not likely to be carcinogenic in humans EPA Integrated Risk Information System (IRIS)

Ecotoxicology

Type of concern: Reference:
Wildlife and environmental toxicity European Union - Classification & Labelling
Not suspected to be an environmental toxin Environment Canada Domestic Substance List

Persistence and bioaccumulation

Type of concern: Reference:
Not suspected to be persistent Environment Canada Domestic Substance List
Not suspected to be bioaccumulative Environment Canada Domestic Substance List



Government, industry, academic studies and classifications

government/industry list/academic study appears on list as classification(s)
European Union - Classification & LabellingBENTAZONE•Harmful
•Harmful if swallowed
•Irritant (eyes, skin, or lungs)
•Irritating to eyes
•May cause sensitization by skin contact
•Harmful to aquatic organisms
Environment Canada Domestic Substance List1H-2,1,3-BENZOTHIADIAZIN-4(3H)-ONE, 3-(1-METHYLETHYL)-, 2,2-DIOXIDE•This chemical was NOT flagged by CEPA for further attention.
EPA Integrated Risk Information System (IRIS)BENTAZON (BASAGRAN)•Group E: Evidence of non-carcinogenicity for humans (EPA classification)
EPA Integrated Risk Information System (IRIS)BENTAZON (BASAGRAN)•Not likely to be carcinogenic in humans (EPA classification)
RTECS®- Mutation Research 2004BENTAZONE• mutagenic - Positive mutation assay: (Drosophila melanogaster orl)



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.
Environment Canada Domestic Substance ListEC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
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.
RTECS®- Mutation Research 2004RTECS®- Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 557,53,2004

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