Drinking water quality · 2023
· Verified
What's in Valley State Prison — Chowchilla, Ca, CA tap water
10 contaminants were measured in the Valley State Prison — Chowchilla, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 10
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Arsenic
- Service area
- CA
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Maximum contaminant level exceededHealth-based19 violations on record · most recent Jul 2015resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 5.4–17 ug/LRangeSystem-wide | None set | At or above the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 68–89 ug/LRangeSystem-wide | 2 ug/LMCL | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.05 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | None set | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.64–0.88 mg/LRangeSystem-wide | None set | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–3.2 pCi/LRangeSystem-wide | 15 pCi/LMCL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.12–0.17 mg/LRangeSystem-wide | 4 mg/LMCL | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detected mg/LReported levelSystem-wide | 10 mg/LMCL | None detected |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | Not detected mg/LReported levelSystem-wide | 1 mg/LMCL | None detected |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 2.4 ug/LReported levelSystem-wide | None set | Within the limit |
People also ask about Valley State Prison — Chowchilla, Ca, CA's water
+Is Valley State Prison — Chowchilla, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Valley State Prison — Chowchilla, Ca, CA water utility lists 1 contaminant at or above the federal limit: Arsenic. Whether that means the water is "unsafe" depends on which contaminant, how long the exposure, and individual health factors. The table on this page shows the measured value, the federal threshold, and the regulated statistic used for compliance.
+What contaminants are in Valley State Prison — Chowchilla, Ca, CA tap water?
10 contaminants were measured in Valley State Prison — Chowchilla, Ca, CA's 2023 Consumer Confidence Report, spanning metals, inorganic chemicals, and disinfectants. 6 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Which contaminants exceed federal limits in Valley State Prison — Chowchilla, Ca, CA tap water?
One contaminant in Valley State Prison — Chowchilla, Ca, CA's 2023 report sits at or above the federal limit: Arsenic (1.7× the limit). The EPA enforces these limits against the regulated reporting statistic — typically a running annual average or 90th percentile — not a one-off sample spike.
+What is the worst contaminant in Valley State Prison — Chowchilla, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Arsenic, at 1.7× the federal threshold. It belongs to the metals family of contaminants.
+Where does the data on this page come from?
Every value is transcribed from Valley State Prison — Chowchilla, Ca, CA's 2023 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Valley State Prison — Chowchilla, Ca, CA's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2023 report; a new report will replace it once the utility publishes its next annual update.