Drinking water quality · 2022
· Verified
What's in City of Rio Vista — Rio Vista, Ca, CA tap water
17 contaminants were measured in the City of Rio Vista — Rio Vista, Ca, CA water system's 2022 annual report. Each is shown below against its federal limit.
- Reporting year
- 2022
- Contaminants measured
- 17
- Over federal limit
- 0
- Approaching the limit
- 1
- Service area
- CA
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 9 ug/LAverageSystem-wide | None set | Approaching the limit |
| SeleniumA trace element from natural deposits and industrial discharge. | 5 ug/LAverageSystem-wide | None set | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 1 ug/L90th percentileAt the tap | None set | 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 |
| BoronA naturally occurring element from rock and soil. | 1.1 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 18 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| Vanadium | 0.503 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 4.27 pCi/LAverageSystem-wide | 15 pCi/LMCL | Within the limit |
| UraniumA naturally occurring radioactive metal from erosion of natural deposits. | 1.826 pCi/LAverageSystem-wide | 20 pCi/LMCL | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 1.8 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.3 mg/LAverageSystem-wide | 4 mg/LMCL | 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/LAverageSystem-wide | None set | Within the limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Nitrate Nitrite | 1.2 mg/LAverageSystem-wide | 10 mg/LMCL | Within the limit |
| Dinoseb | Not detected ug/LAverageSystem-wide | None set | Within the limit |
| Pentachlorophenol | Not detected ug/LAverageSystem-wide | None set | Within the limit |
| Picloram | Not detected ug/LAverageSystem-wide | None set | Within the limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.05 mg/LAverageSystem-wide | 4 mg/LMCL | Within the limit |
People also ask about City of Rio Vista — Rio Vista, Ca, CA's water
+Is City of Rio Vista — Rio Vista, Ca, CA tap water safe to drink in 2022?
Every one of the 17 contaminants measured in City of Rio Vista — Rio Vista, Ca, CA's 2022 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 City of Rio Vista — Rio Vista, Ca, CA tap water?
17 contaminants were measured in City of Rio Vista — Rio Vista, Ca, CA's 2022 Consumer Confidence Report, spanning metals, other, and inorganic chemicals. 7 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Are any contaminants in City of Rio Vista — Rio Vista, Ca, CA tap water approaching the federal limit?
One contaminant is between 80% and 100% of the federal limit in this report: Arsenic. Approaching means measured but not in violation — a margin that can close quickly if conditions change.
+Where does the data on this page come from?
Every value is transcribed from City of Rio Vista — Rio Vista, Ca, CA's 2022 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 City of Rio Vista — Rio Vista, 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 2022 report; a new report will replace it once the utility publishes its next annual update.