Drinking water quality · 2021
· Verified
What's in Ukiah, City of — Ukiah, Ca, CA tap water
19 contaminants were measured in the Ukiah, City of — Ukiah, Ca, CA water system's 2021 annual report. Each is shown below against its federal limit.
- Reporting year
- 2021
- Contaminants measured
- 19
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- CA
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.
- Maximum contaminant level exceededHealth-based1 violation on record · most recent Feb 1996resolved
- Monitoring & reporting1 violation on record · most recent Oct 20221 open
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.3–1.75 mg/LRangeDistribution System | None set | Within the limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.47 mg/L90th percentileAt the tap | 1.3 mg/LAction level | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0–0.11 mg/LRangeGroundwater | 2 mg/LMCL | Within the limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| Chromium, TotalTotal chromium — the sum of all chromium forms, from natural deposits and industrial discharge. | 0–0.4 ug/LRangeSurface Water | None set | Within the limit |
+By source (3)— Surface Water, Distribution System, Groundwater
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | Not detected ug/L90th percentileAt the tap | None set | None detected |
| BoronA naturally occurring element from rock and soil. | 0–430 ug/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Surface Water, Distribution System
| |||
| CalciumA naturally occurring mineral that contributes to water hardness. | 21–33 mg/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| MagnesiumA naturally occurring mineral that contributes to water hardness. | 17–20 mg/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| SodiumA naturally occurring salt component. | 11–20 mg/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| Strontium | 210–320 ug/LRangeDistribution System | None set | Detected — no federal limit |
+By source (3)— Distribution System, Groundwater, Surface Water
| |||
| Vanadium | 0.57–1.8 ug/LRangeDistribution System | None set | Detected — no federal limit |
+By source (3)— Distribution System, Groundwater, Surface Water
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 1.6–2.7 mg/LRangeGroundwater | 10 mg/LMCL | Within the limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0–0.11 mg/LRangeGroundwater | 4 mg/LMCL | Within the limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 0.033–0.18 ug/LRangeDistribution System | None set | Within the limit |
+By source (3)— Distribution System, Surface Water, Groundwater
| |||
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorateA byproduct that can form during disinfection, especially when hypochlorite solutions degrade. | 52–290 ug/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 110–170 mg/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| Bicarbonate | 100–210 mg/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| HardnessA measure of dissolved calcium and magnesium minerals. | 128–163 mg/LRangeGroundwater | None set | Detected — no federal limit |
+By source (3)— Groundwater, Distribution System, Surface Water
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 100Reported levelSurface Water | None set | Detected — no federal limit |
People also ask about Ukiah, City of — Ukiah, Ca, CA's water
+Is Ukiah, City of — Ukiah, Ca, CA tap water safe to drink in 2021?
Every one of the 19 contaminants measured in Ukiah, City of — Ukiah, Ca, CA's 2021 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 Ukiah, City of — Ukiah, Ca, CA tap water?
19 contaminants were measured in Ukiah, City of — Ukiah, Ca, CA's 2021 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.
+Where does the data on this page come from?
Every value is transcribed from Ukiah, City of — Ukiah, 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 Ukiah, City of — Ukiah, 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.