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Chlorine Free in U.S. tap water
90 public water systems across 12 U.S. states report Chlorine Free 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 |
|---|---|---|
| Avila Beach Community Services District — Avila Beach, Ca, CA 2023 annual report | 2.5–4.18 mg/L | 1.0× the limit |
| Pismo Beach Water Department — Pismo Beach, Ca, CA 2023 annual report | 2.5–4.18 mg/L | 1.0× the limit |
Approaching the limit (1)
| Water system | Measured | vs. limit |
|---|---|---|
| Lopez Project — San Luis Obispo, Ca, CA 2023 annual report | 3.43 mg/L | 0.9× the limit |
Within the federal limit (87)
Showing 50 of 87. The full list is in the JSON API.
Chlorine Free by state
Every state where a public water system reports Chlorine Free in its annual report, ranked by systems at or above the federal limit.
Frequently asked
+What is Chlorine Free?
Chlorine Free 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 Free in drinking water?
The federal MCL for Chlorine Free 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 Free over the federal limit?
2 of the 90 public water systems on The Water Map report Chlorine Free at or above its federal limit, spanning 12 U.S. states. The full list is on this page.
+Which states report the most Chlorine Free in their drinking water?
Of the systems on The Water Map, California (2 systems at or above the limit) report the most Chlorine Free exceedances. The state-by-state table on this page lists every state.
+How can I check if Chlorine Free 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 Free.