Drinking water quality · 2023
· Verified
What's in Eureka, City of — Eureka, Ca, CA tap water
14 contaminants were measured in the Eureka, City of — Eureka, Ca, CA water system's 2023 annual report. Each is shown below against its federal limit.
- Reporting year
- 2023
- Contaminants measured
- 14
- 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.
- Treatment technique violationHealth-based1 violation on record · most recent Jun 1993resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 9.5–18 ug/LReported levelSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 3.7–7.4 ug/LReported levelSystem-wide | None set | Within the limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.46–0.56 mg/LReported levelSystem-wide | None set | Within the limit |
| ChlorideA naturally occurring salt compound. | 3.9 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 10 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.17–0.49 mg/LReported levelSystem-wide | 4 mg/LMCL | Within the limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.02–0.08 NTUReported levelSystem-wide | 1 NTUMCL | Within the limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 67–83 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
| pHA measure of how acidic or basic the water is. | 7.2–7.5Reported levelSystem-wide | None set | Detected — no federal limit |
| Specific ConductanceA measure of how well water conducts electricity, which tracks dissolved mineral content. | 140–182 uS/cmReported levelSystem-wide | None set | Detected — no federal limit |
| Total Dissolved SolidsTotal dissolved solids — the combined content of all dissolved minerals and salts. | 90 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 90 ug/LReported levelSystem-wide | 1700 ug/LPublic health goal | Within the limit |
| AluminumA common element sometimes used as a treatment coagulant. | 0.011 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 3.7 mg/LReported levelSystem-wide | None set | Detected — no federal limit |
People also ask about Eureka, City of — Eureka, Ca, CA's water
+Is Eureka, City of — Eureka, Ca, CA tap water safe to drink in 2023?
Every one of the 14 contaminants measured in Eureka, City of — Eureka, Ca, CA's 2023 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 Eureka, City of — Eureka, Ca, CA tap water?
14 contaminants were measured in Eureka, City of — Eureka, Ca, CA's 2023 Consumer Confidence Report, spanning physical & aggregate, inorganic chemicals, and metals. 3 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 Eureka, City of — Eureka, 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 Eureka, City of — Eureka, 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.