The Power of Information

National Drinking Water Database


Simazine in North Carolina


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 North Carolina

24 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
(Range)
1City of Monroe
Monroe, NC
32,4548 of 100.22 ppb
(0 to 0.39 ppb)
2Johnston Co Water System
Wilson Mills, NC
62,2309 of 130.22 ppb
(0 to 0.78 ppb)
3Chatham Co Water System
Apex, NC
10,98814 of 160.15 ppb
(0 to 0.31 ppb)
4Reeves Woods
Mt Airy, NC
1021 of 50.11 ppb
(0 to 0.56 ppb)
5City of Salisbury
Salisbury, NC
46,6001 of 70.11 ppb
(0 to 0.77 ppb)
6City of Sanford
Sanford, NC
43,6504 of 70.07 ppb
(0 to 0.15 ppb)
7Town of Lexington
Lexington, NC
22,4153 of 70.07 ppb
(0 to 0.34 ppb)
8City of Thomasville
Thomasville, NC
25,8721 of 50.06 ppb
(0 to 0.29 ppb)
9City of Albemarle
Albemarle, NC
16,0427 of 170.05 ppb
(0 to 0.18 ppb)
10Amber Ridge S/D
Knightdale, NC
6802 of 140.05 ppb
(0 to 0.45 ppb)

Health Based Limits for Simazine

StandardDescriptionLevel
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 North Carolina

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in North Carolina since 2004

Violation TypeNumber of Violations
Failure to monitor regularly211