Drinking water quality · 2021
· Verified
What's in Petaluma, City of — Petaluma, Ca, CA tap water
11 contaminants were measured in the Petaluma, City of — Petaluma, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2021
- Contaminants measured
- 11
- Over federal limit
- 1
- 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. | 0–13 ug/LRangePetaluma Public Works & Utilities | None set | At or above the limit |
+By source (2)— Petaluma Public Works & Utilities, Sonoma County Water Agency
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 0–0.19 mg/LRangePetaluma Public Works & Utilities | 2 mg/LMCL | Within the limit |
+By source (2)— Petaluma Public Works & Utilities, Sonoma County Water Agency
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.055 mg/L90th percentilePetaluma Public Works & Utilities | 1.3 mg/LAction level | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.009 ug/L90th percentilePetaluma Public Works & Utilities | None set | Within the limit |
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | Not detected ug/LReported levelSonoma County Water Agency | None set | None detected |
+By source (2)— Sonoma County Water Agency, Petaluma Public Works & Utilities
| |||
| AluminumA common element sometimes used as a treatment coagulant. | 0–0.053 mg/LRangePetaluma Public Works & Utilities | None set | Detected — no federal limit |
+By source (2)— Petaluma Public Works & Utilities, Sonoma County Water Agency
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 23.73–28.27 ug/LRangePetaluma Public Works & Utilities | None set | Within the limit |
+By source (2)— Petaluma Public Works & Utilities, Sonoma County Water Agency
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Combined RadiumCombined radium-226 and radium-228 — naturally occurring radioactive elements. | 0–1.18 pCi/LRangeSonoma County Water Agency | 5 pCi/LMCL | Within the limit |
+By source (2)— Sonoma County Water Agency, Petaluma Public Works & Utilities
| |||
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 0–3.11 pCi/LRangePetaluma Public Works & Utilities | 15 pCi/LMCL | Within the limit |
+By source (2)— Petaluma Public Works & Utilities, Sonoma County Water Agency
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–1.4 mg/LRangePetaluma Public Works & Utilities | 10 mg/LMCL | Within the limit |
+By source (2)— Petaluma Public Works & Utilities, Sonoma County Water Agency
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0–0.2 mg/LRangePetaluma Public Works & Utilities | 4 mg/LMCL | Within the limit |
+By source (2)— Petaluma Public Works & Utilities, Sonoma County Water Agency
| |||
People also ask about Petaluma, City of — Petaluma, Ca, CA's water
+Is Petaluma, City of — Petaluma, Ca, CA tap water safe to drink in 2021?
The 2021 Consumer Confidence Report for the Petaluma, City of — Petaluma, 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 Petaluma, City of — Petaluma, Ca, CA tap water?
11 contaminants were measured in Petaluma, City of — Petaluma, Ca, CA's 2021 Consumer Confidence Report, spanning metals, inorganic chemicals, and radionuclides. 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 Petaluma, City of — Petaluma, Ca, CA tap water?
One contaminant in Petaluma, City of — Petaluma, Ca, CA's 2021 report sits at or above the federal limit: Arsenic (1.3× 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 Petaluma, City of — Petaluma, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2021 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 Petaluma, City of — Petaluma, Ca, CA's 2021 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 Petaluma, City of — Petaluma, 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 2021 report; a new report will replace it once the utility publishes its next annual update.