Drinking water quality · 2023
· Verified
What's in Rohnert Park, City of — Rohnert Park, Ca, CA tap water
15 contaminants were measured in the Rohnert Park, City of — Rohnert Park, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 15
- 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. | 2.4–13 ug/LRangeCity of Rohnert Park | None set | At or above the limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.054 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. | 0.00067 ug/L90th percentileAt the tap | None set | Within the limit |
| CalciumA naturally occurring mineral that contributes to water hardness. | 20–46 mg/LRangeCity of Rohnert Park | None set | Detected — no federal limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 14–18 mg/LRangeSonoma Water | None set | Detected — no federal limit |
+By source (2)— Sonoma Water, City of Rohnert Park
| |||
| SodiumA naturally occurring salt component. | 19–47 mg/LRangeCity of Rohnert Park | None set | Detected — no federal limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0–7.8 mg/LRangeCity of Rohnert Park | 10 mg/LMCL | Within the limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.1–0.2 mg/LRangeCity of Rohnert Park | 4 mg/LMCL | Within the limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 0–23.64 ug/LRangeSonoma Water | None set | Within the limit |
+By source (2)— Sonoma Water, City of Rohnert Park
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 9.1–10.1 ug/LRangeCity of Rohnert Park | None set | Within the limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Gross AlphaGross alpha particle activity — a combined measure of alpha-emitting radioactive substances. | 1.05–2.43 pCi/LRangeCity of Rohnert Park | 15 pCi/LMCL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 150–210 mg/LRangeCity of Rohnert Park | None set | Detected — no federal limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
| Bicarbonate | 150–210 mg/LRangeCity of Rohnert Park | None set | Detected — no federal limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 103–221 mg/LRangeCity of Rohnert Park | None set | Detected — no federal limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
| pHA measure of how acidic or basic the water is. | 7.3–8.1RangeCity of Rohnert Park | None set | Detected — no federal limit |
+By source (2)— City of Rohnert Park, Sonoma Water
| |||
People also ask about Rohnert Park, City of — Rohnert Park, Ca, CA's water
+Is Rohnert Park, City of — Rohnert Park, Ca, CA tap water safe to drink in 2023?
The 2023 Consumer Confidence Report for the Rohnert Park, City of — Rohnert Park, 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 Rohnert Park, City of — Rohnert Park, Ca, CA tap water?
15 contaminants were measured in Rohnert Park, City of — Rohnert Park, Ca, CA's 2023 Consumer Confidence Report, spanning metals, physical & aggregate, and disinfection byproducts. 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.
+Which contaminants exceed federal limits in Rohnert Park, City of — Rohnert Park, Ca, CA tap water?
One contaminant in Rohnert Park, City of — Rohnert Park, Ca, CA's 2023 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 Rohnert Park, City of — Rohnert Park, 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 Rohnert Park, City of — Rohnert Park, 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 Rohnert Park, City of — Rohnert Park, 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.