VOCs & pesticides
Simazine in U.S. tap water
34 public water systems across 9 U.S. states report Simazine in their annual Consumer Confidence Report. 2 sit at or above the federal limit.
At or above the federal limit (2)
| Water system | Measured | vs. limit |
|---|---|---|
| Columbus, OH 2025 annual report | 2025 | 506.3× the limit |
| Charlotte, NC 2024 annual report | 29 ng/L | 7.3× the limit |
Within the federal limit (31)
| Water system | Measured |
|---|---|
| Broken Arrow, OK 2024 annual report | 0.681–1.16 ug/L |
| Plano, TX 2024 annual report | 0.71 ug/L |
| Edmond, OK 2024 annual report | 0.286 ug/L |
| Norman, OK 2024 annual report | 0–0.27 ug/L |
| Fishers, IN 2024 annual report | 0–0.2 ug/L |
| Indianapolis, IN 2024 annual report | 0–0.2 ug/L |
| Morgan County, IN 2024 annual report | 0.2 ug/L |
| Westfield, IN 2024 annual report | 0.2 ug/L |
| Lewisville, TX 2024 annual report | 0.07–0.15 ug/L |
| League City, TX 2024 annual report | 0.14 ug/L |
| Sugar Land, TX 2024 annual report | 0.13 ug/L |
| Raleigh, NC 2024 annual report | 0.1 ug/L |
| Town of Garner, NC 2024 annual report | 0.1 ug/L |
| Town of Knightdale, NC 2024 annual report | 0–0.1 ug/L |
| Town of Rolesville, NC 2024 annual report | 0.1 ug/L |
| Town of Wake Forest, NC 2024 annual report | 0–0.1 ug/L |
| Town of Wendell, NC 2024 annual report | 0–0.1 ug/L |
| Town of Zebulon, NC 2024 annual report | 0–0.1 ug/L |
| Charleston, SC 2024 annual report | 16 ng/L |
| North Charleston, SC 2024 annual report | 16 ng/L |
| Mckinney, TX 2024 annual report | 0.071–0.071 ug/L |
| Mesquite, TX 2024 annual report | 0.071 ug/L |
| Dallas, TX 2024 annual report | 0.06 ug/L |
| New Orleans, LA 2024 annual report | 0–0.054 ug/L |
| Austin, TX 2024 annual report | 0.03 ug/L |
| Houston, TX 2023 annual report | 0.03 ug/L |
| Cleveland, OH 2024 annual report | Not detected |
| High Point, NC 2024 annual report | Not detected ug/L |
| Mobile, AL 2024 annual report | Not detected |
| Montgomery, AL 2024 annual report | Not detected |
| Nashville, TN 2023 annual report | Not detected |
Frequently asked
+What is Simazine?
Simazine is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Simazine in drinking water?
The federal MCL for Simazine is 4 ug/L. The EPA enforces this against the regulated reporting statistic (typically a running annual average or 90th percentile), not a single-sample spike.
+How many U.S. water systems have Simazine over the federal limit?
2 of the 34 public water systems on The Water Map report Simazine at or above its federal limit, spanning 9 U.S. states. The full list is on this page.
+How can I check if Simazine is in my city's tap water?
Search your city on The Water Map (https://www.thewatermap.com/) or browse the list on this page. Every U.S. public water utility is required to publish an annual Consumer Confidence Report that lists every contaminant it measured, including Simazine.