Drinking water quality · 2023
· Verified
What's in San Miguel Community Services District — San Miguel, Ca, CA tap water
16 contaminants were measured in the San Miguel Community Services District — San Miguel, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 3 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 16
- Over federal limit
- 3
- Approaching the limit
- 0
- Worst contaminant
- Arsenic
- Service area
- CA
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 3–13 ug/LRangeSystem-wide | None set | At or above the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 0–10 ug/LRangeSystem-wide | None set | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.124 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 |
| BoronA naturally occurring element from rock and soil. | 0–0.4 mg/LRangeSystem-wide | 1 mg/LNL | Detected — no federal limit |
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.95–1.5 ug/LRangeSystem-wide | None set | Detected — no federal limit |
| Vanadium | 12–20 ug/LRangeSystem-wide | 50 ug/LNL | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 10.8–18 pCi/LRangeSystem-wide | 15 pCi/LMCL | At or above the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 7.62–12 pCi/LRangeSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | 0–4.5 ng/LRangeSystem-wide | 6.5 ng/LNL | At or above the limit |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | 0–1.9 ng/LRangeSystem-wide | 3 ng/LNL | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 1.6–7.5 mg/LRangeSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.01–0.4 mg/LRangeSystem-wide | 4 mg/LMCL | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Total | 0.27–2.24 mg/LRangeSystem-wide | None set | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 11 ug/LReported levelSystem-wide | None set | Within the limit |
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Highest single sampleNo. of Detections | 0MCLG | None detected |
People also ask about San Miguel Community Services District — San Miguel, Ca, CA's water
+Is San Miguel Community Services District — San Miguel, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the San Miguel Community Services District — San Miguel, Ca, CA water utility lists 3 contaminants at or above the federal limit: Arsenic, Gross Alpha, and PFOS. 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 San Miguel Community Services District — San Miguel, Ca, CA tap water?
16 contaminants were measured in San Miguel Community Services District — San Miguel, Ca, CA's 2023 Consumer Confidence Report, spanning metals, inorganic chemicals, and pfas ("forever chemicals"). 10 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 San Miguel Community Services District — San Miguel, Ca, CA tap water?
3 contaminants in San Miguel Community Services District — San Miguel, Ca, CA's 2023 report sit at or above the federal limit: Arsenic (1.3× the limit); Gross Alpha (1.2× the limit); PFOS (1.1× 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 San Miguel Community Services District — San Miguel, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Arsenic, at 1.3× 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 San Miguel Community Services District — San Miguel, 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 San Miguel Community Services District — San Miguel, 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.