Other
Chlorine Total in U.S. tap water
288 public water systems across 15 U.S. states report Chlorine Total in their annual Consumer Confidence Report. 13 sit at or above the federal limit.
At or above the federal limit (13)
| Water system | Measured | vs. limit |
|---|---|---|
| Centennial, CO 2023 annual report | 1.71–100 mg/L | 25.0× the limit |
| New Orleans, LA 2024 annual report | 0.3–49 mg/L | 12.3× the limit |
| Lomita-city, Water Dept. — Lomita, Ca, CA 2021 annual report | 5 mg/L | 1.3× the limit |
| Chesapeake, VA 2023 annual report | 1.3–4.6 mg/L | 1.1× the limit |
| City of Hemet, CA 2024 annual report | 0–4.3 mg/L | 1.1× the limit |
| City of Menifee, CA 2024 annual report | 0–4.3 mg/L | 1.1× the limit |
| City of Murrieta, CA 2024 annual report | 0–4.3 mg/L | 1.1× the limit |
| City of San Jacinto, CA 2024 annual report | 0–4.3 mg/L | 1.1× the limit |
| East Valley Service Area, CA 2024 annual report | 0–4.3 mg/L | 1.1× the limit |
| Mills Service Area, CA 2024 annual report | 0–4.3 mg/L | 1.1× the limit |
| Moreno Valley, CA 2024 annual report | 0–4.3 mg/L | 1.1× the limit |
| West Palm Beach, FL 2024 annual report | 0.4–4.3 mg/L | 1.1× the limit |
| Beverly Hills-city, Water Dept. — Beverly Hills, Ca, CA 2022 annual report | 0.61–4 mg/L | 1.0× the limit |
Approaching the limit (20)
| Water system | Measured | vs. limit |
|---|---|---|
| Carlsbad MWD — Carlsbad, Ca, CA 2023 annual report | 2–3.9 mg/L | 1.0× the limit |
| Vista Irrigation District — Vista, Ca, CA 2023 annual report | 2–3.9 mg/L | 1.0× the limit |
| Avila Beach Community Services District — Avila Beach, Ca, CA 2023 annual report | 0.18–3.84 mg/L | 1.0× the limit |
| City of Buellton Water Division — Buellton, Ca, CA 2023 annual report | 0.18–3.84 mg/L | 1.0× the limit |
| Santa Ynez River Water Cons. Dist. Id#1 — Santa Ynez, Ca, CA 2023 annual report | 0.18–3.84 mg/L | 1.0× the limit |
| Solvang Water Division — Solvang, Ca, CA 2023 annual report | 0.18–3.84 mg/L | 1.0× the limit |
| Cedar Rapids, IA 2024 annual report | 1.9–3.8 mg/L | 0.9× the limit |
| City of Robins, IA 2024 annual report | 1.9–3.8 mg/L | 0.9× the limit |
| Glenbrook Cove Subdivision of Marion, IA 2024 annual report | 1.9–3.8 mg/L | 0.9× the limit |
| Poweshiek Water Association, IA 2024 annual report | 1.9–3.8 mg/L | 0.9× the limit |
| Sioux Falls, SD 2024 annual report | 2.3–3.8 mg/L | 0.9× the limit |
| Rowland Water District — Rowland Heights, Ca, CA 2023 annual report | 0.95–3.61 mg/L | 0.9× the limit |
| Chula Vista Otay, CA 2024 annual report | 0.2–3.6 mg/L | 0.9× the limit |
| Oceano Comm Services Dist. — Oceano, Ca, CA 2021 annual report | 2.18–3.6 mg/L | 0.9× the limit |
| Otay Water District — Spring Valley, Ca, CA 2023 annual report | 0.2–3.6 mg/L | 0.9× the limit |
| Valencia Heights Water Co. — West Covina, Ca, CA 2021 annual report | 0.3–3.6 mg/L | 0.9× the limit |
| Evansville, IN 2024 annual report | 0.5–3.4 mg/L | 0.8× the limit |
| Vallecitos Wd — San Marcos, Ca, CA 2023 annual report | 0.3–3.4 mg/L | 0.8× the limit |
| City of Santa Maria Utilities Department — Santa Maria, Ca, CA 2023 annual report | 0.12–3.3 mg/L | 0.8× the limit |
| Glendora-city, Water Dept. — Glendora, Ca, CA 2020 annual report | 0.01–3.3 mg/L | 0.8× the limit |
Within the federal limit (255)
Showing 50 of 255. The full list is in the JSON API.
Chlorine Total by state
Every state where a public water system reports Chlorine Total in its annual report, ranked by systems at or above the federal limit.
Frequently asked
+What is Chlorine Total?
Chlorine Total is a contaminant some U.S. public water utilities measure and report in their annual Consumer Confidence Report.
+What is the federal limit for Chlorine Total in drinking water?
The federal MRDLG for Chlorine Total is 4 mg/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 Chlorine Total over the federal limit?
13 of the 288 public water systems on The Water Map report Chlorine Total at or above its federal limit, spanning 15 U.S. states. The full list is on this page.
+Which states report the most Chlorine Total in their drinking water?
Of the systems on The Water Map, California (9 systems at or above the limit), Colorado (1 system at or above the limit), Louisiana (1 system at or above the limit) report the most Chlorine Total exceedances. The state-by-state table on this page lists every state.
+How can I check if Chlorine Total 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 Chlorine Total.