Microbial · 2024
Total Coliform in Contra Costa Water District, CA tap water
Contra Costa Water District, CA's 2024 Total Coliform measurement is below the federal limit of 5 % (MCL).
The measurement
| Statistic | Value | Federal limit |
|---|---|---|
Average System-wide | 0.1 % | 5 % MCL |
Average System-wide | 0.5 % | 5 % MCL |
Range System-wide | 0–3.6 | 5 MCL |
Range System-wide | 0–0.8 | 5 MCL |
Verbatim from Contra Costa Water District, CA's 2024 Consumer Confidence Report — source document ↗
About Total Coliform
A group of bacteria used as an indicator of overall water-system sanitation.
Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.
How Contra Costa Water District, CA compares
1 of the 93 systems measuring Total Coliform on The Water Map have it at or above the federal limit:
Nearby systems also reporting Total Coliform:
People also ask
+Is there Total Coliform in Contra Costa Water District, CA tap water?
Yes — Contra Costa Water District, CA's 2024 Consumer Confidence Report lists Total Coliform at 0.5 %. Contra Costa Water District, CA's 2024 Total Coliform measurement is below the federal limit of 5 % (MCL).
+What's the federal limit for Total Coliform in drinking water?
The federal MCL for Total Coliform is 5 %. The EPA enforces this against the regulated reporting statistic (running annual average or 90th percentile), not a single-sample spike.
+What is Total Coliform?
A group of bacteria used as an indicator of overall water-system sanitation. Coliforms themselves are usually harmless, but their presence signals that disease-causing organisms could enter the system.
+Which other U.S. cities have Total Coliform over the federal limit?
1 of the 93 systems on The Water Map measuring Total Coliform report it at or above the federal limit. Examples include Thornton, CO.
+Where does this Total Coliform measurement come from?
This page reproduces the Total Coliform entry from the 2024 Consumer Confidence Report published by the Contra Costa Water District, CA water utility — the annual drinking-water report every U.S. utility is required by federal law to publish. The original source document is archived at /water/ca/contra-costa-water-district/2024/source.