The Power of Information

National Drinking Water Database

National Drinking Water Database - Chemical Contaminants


Status: Regulated - EPA has established a maximum legal limit in tapwater for this contaminant.

Desethylatrazine is a metabolite of the herbicide atrazine, an endocrine-disrupting herbicide used on corn, sugarcane and sorghum. [read more]

Found above
health guidelines
Found above
legal limit
Water utilities
People Served

Desethylatrazine Exposure by State

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

StateWater Suppliers with Desethylatrazine contamination

The Most Polluted Communities

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

Ranked by highest average Desethylatrazine level

RankSystem Population Served Positive test results of total reported tests Average Level
1Kaltenberg Seed Farms Inc
Waunakee, WI
502 of 20.34 ppb
(0.31 to 0.37 ppb)
2Manchester Water Supply
Manchester, IA
5,2571 of 10.1 ppb
(0.1 ppb)
3Cedar Rapids Water Department
Cedar Rapi, IA
124,4884 of 520.01 ppb
(0 to 0.16 ppb)

Health Based Limits for Desethylatrazine

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.3 ppb

Testing Summary for Desethylatrazine

Are tests routinely required for Desethylatrazine by federal law?Yes
Water suppliers reporting tests for Desethylatrazine (2004-2009):124 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.3 per year