VOCs & pesticides
Simazine in U.S. tap water
66 public water systems across 10 U.S. states report Simazine in their annual Consumer Confidence Report. 4 sit at or above the federal limit.
At or above the federal limit (4)
| Water system | Measured | vs. limit |
|---|---|---|
| Columbus, OH 2025 annual report | 0–0.06 mg/L | 15.0× the limit |
| Delano, City of — Delano, Ca, CA 2023 annual report | 4 ug/L | 1.0× the limit |
| Frisco, TX 2024 annual report | 4 ug/L | 1.0× the limit |
| Mendota, City of — Mendota, Ca, CA 2023 annual report | 0.004–4 ug/L | 1.0× the limit |
Within the federal limit (62)
| Water system | Measured |
|---|---|
| Broken Arrow, OK 2024 annual report | 1.16 ug/L |
| Plano, TX 2024 annual report | 0.71 ug/L |
| Indianapolis, IN 2023 annual report | 0.41 ug/L |
| Indianapolis, IN 2023 annual report | 0.41 ug/L |
| Morgan County, IN 2023 annual report | 0.41 ug/L |
| Westfield, IN 2023 annual report | 0.41 ug/L |
| Edmond, OK 2024 annual report | 0.286 ug/L |
| Grand Prairie, TX 2024 annual report | 0.284 ug/L |
| Norman, OK 2024 annual report | 0.27 ug/L |
| Fishers, IN 2024 annual report | 0.2 ug/L |
| Indianapolis, IN 2024 annual report | 0.2 ug/L |
| Morgan County, IN 2024 annual report | 0–0.2 ug/L |
| Westfield, IN 2024 annual report | 0–0.2 ug/L |
| Lewisville, TX 2024 annual report | 0.15 ug/L |
| League City, TX 2024 annual report | 0.14 ug/L |
| Pearland, 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 | 0.1 ug/L |
| Town of Rolesville, NC 2024 annual report | 0.1 ug/L |
| Town of Wake Forest, NC 2024 annual report | 0.1 ug/L |
| Town of Wendell, NC 2024 annual report | 0.1 ug/L |
| Town of Zebulon, NC 2024 annual report | 0.1 ug/L |
| Garland, TX 2024 annual report | 0.071 ug/L |
| Mckinney, TX 2024 annual report | 0.071 ug/L |
| Mesquite, TX 2024 annual report | 0.071–0.071 ug/L |
| Dallas, TX 2024 annual report | 0.06 ug/L |
| Montecito Water Dist — Santa Barbara, Ca, CA 2023 annual report | 0.059 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 |
| Charlotte, NC 2024 annual report | 29 ng/L |
| Charleston, SC 2024 annual report | 16 ng/L |
| North Charleston, SC 2024 annual report | 16 ng/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2023 annual report | Not detected ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2020 annual report | Not detected ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2021 annual report | Not detected ug/L |
| Antelope Valley East Kern Water Agency — Palmdale, Ca, CA 2022 annual report | Not detected ug/L |
| Boron Csd — Boron, Ca, CA 2022 annual report | Not detected ug/L |
| Cleveland, OH 2024 annual report | Not detected mg/L |
| Correctional Training Facility - Soledad — Soledad, Ca, CA 2023 annual report | 0 ug/L |
| Covina Irrigating Co. — West Covina, Ca, CA 2023 annual report | Not detected ug/L |
| Covina Irrigating Co. — West Covina, Ca, CA 2020 annual report | Not detected ug/L |
| Covina Irrigating Co. — West Covina, Ca, CA 2021 annual report | Not detected ug/L |
| Foothill Municipal Water Dist. — La Canada Flintridge, Ca, CA 2023 annual report | Not detected ug/L |
| Golden Hills Csd — Tehachapi, Ca, CA 2022 annual report | 0 ug/L |
| High Point, NC 2024 annual report | Not detected ug/L |
| Lockeford Community Serv. Dist. — Lockeford, Ca, CA 2023 annual report | Not detected ug/L |
| Mobile, AL 2024 annual report | Not detected ug/L |
Showing 50 of 62. The full list is in the JSON API.
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 NL for Simazine is 700 ng/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?
4 of the 66 public water systems on The Water Map report Simazine at or above its federal limit, spanning 10 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.