Drinking water quality · 2023
· Verified
What's in Eureka, City of — Eureka, Ca, CA tap water
15 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 — 1 sit at or above that limit.
- Reporting year
- 2023
- Contaminants measured
- 15
- Over federal limit
- 1
- Approaching the limit
- 0
- Worst contaminant
- Lead
- Service area
- CA
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 90 ug/LReported levelSystem-wide | 2 ug/LPublic health goal | At or above the limit |
| 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 |
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 |
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?
The 2023 Consumer Confidence Report for the Eureka, City of — Eureka, Ca, CA water utility lists 1 contaminant at or above the federal limit: Lead. 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 Eureka, City of — Eureka, Ca, CA tap water?
15 contaminants were measured in Eureka, City of — Eureka, Ca, CA's 2023 Consumer Confidence Report, spanning physical & aggregate, metals, 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.
+Which contaminants exceed federal limits in Eureka, City of — Eureka, Ca, CA tap water?
One contaminant in Eureka, City of — Eureka, Ca, CA's 2023 report sits at or above the federal limit: Lead (6.0× 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 Eureka, City of — Eureka, Ca, CA tap water?
The contaminant with the highest measured value relative to its federal limit in the 2023 report is Lead, at 6.0× 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 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.