The Power of Information

National Drinking Water Database

Simazine in Texas

Simazine is a widely used herbicide that has been associated with endocrine disruption and cancer in experimental studies. [read more]

The Most Polluted Communities in Texas

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

Ranked by highest average Simazine level

RankSystem Population Served Positive test results of total reported tests Average Level
1Tra Tarrant County Water Project
Arlington, TX
254 of 40.26 ppb
(0.2 to 0.33 ppb)
2Dallas County Park Cities Mud
Dallas, TX
253 of 40.25 ppb
(0 to 0.5 ppb)
3Waterwood Mud 1
Huntsville, TX
9003 of 40.24 ppb
(0 to 0.61 ppb)
4Travis County Wcid 18
Houston, TX
4,8261 of 60.22 ppb
(0 to 1.3 ppb)
5City of Midlothian
Midlothian, TX
8,0008 of 90.2 ppb
(0 to 0.31 ppb)
6Tra Huntsville Regional Water Supply
Huntsville, TX
253 of 40.19 ppb
(0 to 0.45 ppb)
7Dallas Water Utilities
Sunnyvale, TX
1,188,5807 of 80.19 ppb
(0 to 0.5 ppb)
8City of Grapevine
Grapevine, TX
42,0593 of 40.17 ppb
(0 to 0.3 ppb)
9City of Lewisville
Lewisville, TX
80,7683 of 40.15 ppb
(0 to 0.24 ppb)
10Livingston Regional Water Supply
Huntsville, TX
254 of 40.14 ppb
(0.11 to 0.18 ppb)

Health Based Limits for Simazine

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.4 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.4 ppb
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.4 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.700 ppb

Violation Summary for Simazine in Texas

There are no violations reported for this contaminant in Texas