Drinking water quality · 2022
· Verified
What's in Sonoma, City of — Sonoma, Ca, CA tap water
19 contaminants were measured in the Sonoma, City of — Sonoma, Ca, CA water system's 2022 annual report. Each is shown below against its federal limit.
- Reporting year
- 2022
- Contaminants measured
- 19
- 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. | 6.9–8.5 ug/LRangeCity of Sonoma | None set | Approaching the limit |
+By source (2)— City of Sonoma, Sonoma County Water Agency
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.11 mg/L90th percentileCity of Sonoma | 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 percentileCity of Sonoma | None set | None detected |
| CalciumA naturally occurring mineral that contributes to water hardness. | 15–27 mg/LRangeSonoma County Water Agency | None set | Detected — no federal limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
| GermaniumA trace metalloid found in some source water. | 0.43–2.1 ug/LRangeCity of Sonoma | None set | Detected — no federal limit |
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 4.9–18 mg/LRangeSonoma County Water Agency | None set | Detected — no federal limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
| ManganeseA naturally occurring metal from soil and rock. | 28–28 ug/LRangeSonoma County Water Agency | None set | Detected — no federal limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
| SodiumA naturally occurring salt component. | 9.6–37 mg/LRangeSonoma County Water Agency | None set | Detected — no federal limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 5.96–22.29 ug/LRangeSonoma County Water Agency | None set | Within the limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 24–28 ug/LRangeCity of Sonoma | None set | Within the limit |
+By source (2)— City of Sonoma, Sonoma County Water Agency
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.37 mg/LReported levelCity of Sonoma | 4 mg/LMCL | Within the limit |
+By source (2)— City of Sonoma, Sonoma County Water Agency
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.35–0.87 mg/LRangeCity of Sonoma | 10 mg/LMCL | Within the limit |
+By source (2)— City of Sonoma, Sonoma County Water Agency
| |||
| BromideA naturally occurring salt found in source water. | 20–38 ug/LRangeCity of Sonoma | None set | Detected — no federal limit |
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | Not detected ug/LReported levelCity of Sonoma | None set | None detected |
+By source (2)— City of Sonoma, Sonoma County Water Agency
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | Not detected pCi/LReported levelCity of Sonoma | 15 pCi/LMCL | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Bicarbonate | 120–150 mg/LRangeSonoma County Water Agency | None set | Detected — no federal limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 56–141 mg/LRangeSonoma County Water Agency | None set | Detected — no federal limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
| pHA measure of how acidic or basic the water is. | 7.27–7.58RangeSonoma County Water Agency | None set | Detected — no federal limit |
+By source (2)— Sonoma County Water Agency, City of Sonoma
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 0–0.78 mg/LRangeCity of Sonoma | None set | Detected — no federal limit |
People also ask about Sonoma, City of — Sonoma, Ca, CA's water
+Is Sonoma, City of — Sonoma, Ca, CA tap water safe to drink in 2022?
Every one of the 19 contaminants measured in Sonoma, City of — Sonoma, 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 Sonoma, City of — Sonoma, Ca, CA tap water?
19 contaminants were measured in Sonoma, City of — Sonoma, Ca, CA's 2022 Consumer Confidence Report, spanning metals, physical & aggregate, and inorganic chemicals. 4 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 Sonoma, City of — Sonoma, 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 Sonoma, City of — Sonoma, 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 Sonoma, City of — Sonoma, 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.