Drinking water quality · 2023
· Verified
What's in Rio Alto Water District — Cottonwood, Ca, CA tap water
13 contaminants were measured in the Rio Alto Water District — Cottonwood, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 13
- Over federal limit
- 0
- Approaching the limit
- 0
- 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-based2 violations on record · most recent Apr 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. | 3 ug/LReported levelSystem-wide | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 51 ug/L90th percentileAt the tap | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected90th percentileAt the tap | None set | None detected |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 4.3 ug/LReported levelSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 16Reported levelSystem-wide | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | Not detectedReported levelSystem-wide | None set | None detected |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorideA naturally occurring salt compound. | 3Reported levelSystem-wide | None set | Detected — no federal limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.18Reported levelSystem-wide | 2MCL | Detected — no federal limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 1Reported levelSystem-wide | 10MCL | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 2Reported levelSystem-wide | None set | Detected — no federal limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 4Highest single sampleNo. of Detections | 0MCLG | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HardnessA measure of dissolved calcium and magnesium minerals. | 89Reported levelSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 190Reported levelSystem-wide | None set | Detected — no federal limit |
People also ask about Rio Alto Water District — Cottonwood, Ca, CA's water
+Is Rio Alto Water District — Cottonwood, Ca, CA tap water safe to drink in 2023?
Every one of the 13 contaminants measured in Rio Alto Water District — Cottonwood, Ca, CA's 2023 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Rio Alto Water District — Cottonwood, Ca, CA tap water?
13 contaminants were measured in Rio Alto Water District — Cottonwood, Ca, CA's 2023 Consumer Confidence Report, spanning metals, inorganic chemicals, and physical & aggregate. 3 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Rio Alto Water District — Cottonwood, 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 Rio Alto Water District — Cottonwood, 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.