National Drinking Water Database
Dinoseb in Washington
Dinoseb is an herbicide historically used on soybeans and vegetables; it is associated with birth defects and reproductive difficulties and has been banned in the U.S. since 1986. [read more]
Dinoseb is an extremely toxic herbicide that was used primarily on soybeans, cotton, corn and vegetables. It was also used as an insecticide in grapes and as a seed crop drying agent.
In October 1986, EPA issued an emergency suspension order that immediately prohibited further sale, distribution and use of pesticide products containing dinoseb in the United States. This action was based on the significant risk of birth defects and other adverse health effects for applicators and other persons with substantial dinoseb exposure. Since that time, the use of dinoseb has been canceled in the United States (Extension Toxicology Network (EXTOXNET) 1993c).
Dinoseb has been detected in groundwater in New York, California, Maine, Massachusetts, Wisconsin, and Oregon. In animal studies, the compound was found to cross the placental barrier, and it can cause birth defects and miscarriages (reviewed in Matsumoto 2008). Dinoseb was shown to cause damage to the reproductive system, and also to the heart, lung, brain, liver and spleen (Integrated Risk Information System (IRIS) 1993b). According to EPA, people who drink water containing dinoseb in excess of the maximum contaminant level (MCL) of 0.007 mg/L (7 parts per billion or ppb) for many years could experience reproductive difficulties (USEPA 2009b).
The Most Polluted Communities in Washington
1 water utilities reported detecting Dinoseb in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average Dinoseb level
|Rank||System||Population Served||Positive test results of total reported tests||Average Level|
|1||Kontree Apartments Water System|
|60||1 of 1||0.66 ppb|
Health Based Limits for Dinoseb
|Maximum Contaminant Limit (MCL)||The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.||7 ppb|
|Maximum Contaminant Limit Goal (MCLG)||A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.||7 ppb|
|Lifetime health-based limit, non-cancer risk||Concentration 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.||7 ppb|
|California Public Health Goals||Defined 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.||14 ppb|
|Drinking Water Equivalent Level||A 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.||35 ppb|
|Children's health-based limit for 1-day exposure||Concentration 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 exposure||Concentration 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|
Violation Summary for Dinoseb in Washington
Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Washington since 2004
|Violation Type||Number of Violations|
|Failure to monitor regularly||405|