Drinking water quality · 2024
· Verified
What's in Santa Rosa, City of, CA tap water
30 contaminants were measured in the Santa Rosa, City of, CA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 30
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
state-level CCR
Where your water comes from · EPA SDWIS
Santa Rosa, City of, CA's drinking water comes from ground water, drawn from 5 sources.
Source
5ground water
- FARMERS LN. · 2
- CARLEY WELL - STANDBY
- PETER SPRING WELL - STANDBY
- LEETE WELL - STANDBY-TEMP OFFLINE
Treatment
4treatment plants
- TREATMENT PLNT-FARMERS LN WELLS 01&02
- TREATMENT PLANT - LEETE WELL - STANDBY
- TREATMENT PLANT - CARLEY WELL - STANDBY
- + 1 more
Distribution
10storage units
Also buys water from SONOMA COUNTY WATER AGENCY.
Source: EPA SDWIS facilities inventory. Methodology.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
No federal drinking-water violations on record for this system.
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0–11.6 ug/LRangeSanta Rosa | 0.2 ug/LPublic health goal | Within the limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| CopperA metal that enters water from corroding household plumbing. | 0.02–0.22 mg/LRangeSanta Rosa | 0.3 mg/LPublic health goal | Within the limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 26.7–27.9 mg/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| Chromium, HexavalentHexavalent chromium ('chromium-6') — the more toxic form of chromium. | 0.29–0.47 ug/LRangeSonoma Water | 0.02 ug/LPublic health goal | Detected — no federal limit |
+By source (2)— Sonoma Water, Santa Rosa
| |||
| LithiumA naturally occurring element found in some groundwater. | 0–93 ug/LRangeRange Detected | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 0–8.3 ug/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| SodiumA naturally occurring salt component. | 47–50.2 mg/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chlorine Free | 0.18–1.74 mg/LRangeSanta Rosa | None set | Within the limit |
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 3.7–25.9 ug/LRangeSonoma Water | None set | Within the limit |
+By source (2)— Sonoma Water, Santa Rosa
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 22.1–32.9 ug/LRangeSanta Rosa | None set | Within the limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.16–0.18 mg/LRangeSanta Rosa | 1 mg/LPublic health goal | Within the limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | Not detected mg/LRangeSonoma Water | 10 mg/LPublic health goal | None detected |
+By source (2)— Sonoma Water, Santa Rosa
| |||
| ChlorideA naturally occurring salt compound. | 16.4–21.7 mg/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| SulfateA naturally occurring mineral from rock and soil. | 13–15 mg/LRangeSonoma Water | None set | Detected — no federal limit |
+By source (2)— Sonoma Water, Santa Rosa
| |||
Microbial
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Escherichia coli (E. coli)Escherichia coli — bacteria found in the gut of humans and animals. | 0Reported levelSanta Rosa | 0Public health goal | None detected |
| Total ColiformA group of bacteria used as an indicator of overall water-system sanitation. | 0 %RangeSanta Rosa | 0 %Public health goal | None detected |
PFAS ("forever chemicals")
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Hexafluoropropylene oxide dimer acidHFPO-DA ('GenX chemicals'), a newer-generation PFAS replacement compound. | Not detected ng/LRangeRange Detected | 10 ng/LMCL | None detected |
| Perfluorobutanesulfonic acidPerfluorobutanesulfonic acid, a shorter-chain PFAS 'forever chemical.' | Not detected ng/LRangeRange Detected | None set | None detected |
| Perfluorohexanesulfonic acidPerfluorohexanesulfonic acid, a PFAS 'forever chemical.' | Not detected ng/LReported levelReporting Value | 3 ng/LMCLG | None detected |
| PFOAPerfluorooctanoic acid, a PFAS 'forever chemical' once used in nonstick and stain-resistant products. | Not detected ng/LRangeRange Detected | 5.1 ng/LMCLG | None detected |
| PFOSPerfluorooctanesulfonic acid, a PFAS 'forever chemical' once used in firefighting foam and coatings. | Not detected ng/LRangeRange Detected | 4 ng/LMCL | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| OdorA measure of detectable smell in the water. | Not detectedReported levelSanta Rosa | None set | None detected |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| AlkalinityA measure of the water's capacity to neutralize acids. | 230–240 mg/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| ColorA measure of visible tint in the water. | 0–6RangeSonoma Water | None set | Detected — no federal limit |
+By source (2)— Sonoma Water, Santa Rosa
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 137–142 mg/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| pHA measure of how acidic or basic the water is. | 7.5–8.6RangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 450–490RangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
| TemperatureThe measured temperature of the water sample. | 10.6–28.8RangeSanta Rosa | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 340–360 mg/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| RadonA naturally occurring radioactive gas that can dissolve into groundwater. | 445–455 pCi/LRangeSanta Rosa | None set | Detected — no federal limit |
+By source (2)— Santa Rosa, Sonoma Water
| |||
Source: Santa Rosa, City of, CA's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. utility is required to publish. The numbers on this page are the utility's own. A water-quality report covers an entire service area, not a single address.
People also ask about Santa Rosa, City of, CA's water
+Is Santa Rosa, City of, CA tap water safe to drink in 2024?
Every one of the 30 contaminants measured in Santa Rosa, City of, CA's 2024 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 Santa Rosa, City of, CA tap water?
30 contaminants were measured in Santa Rosa, City of, CA's 2024 Consumer Confidence Report, spanning physical & aggregate, metals, and pfas ("forever chemicals"). 11 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Santa Rosa, City of, CA's 2024 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 Santa Rosa, City of, 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 2024 report; a new report will replace it once the utility publishes its next annual update.
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