Drinking water quality · 2024
What's in Bellevue, WA tap water
12 contaminants were measured in the Bellevue, WA water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 12
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- WA
Where your water comes from · EPA SDWIS
Bellevue, WA's drinking water comes from ground water, drawn from 4 sources.
Source
- SAMENA WELL 3
- CROSSROADS WELL 5
- CROSSROADS WELL 6
- CROSSROADS WELL 7
Treatment
- Purchased surface water
Distribution
Also buys water from REDMOND WATER SYSTEM CITY OF, COAL CREEK UTILITY DISTRICT, and 2 more.
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 Jan 1995resolved
- Maximum contaminant level exceededHealth-based1 violation on record · most recent Jan 1992resolved
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 23 ug/LAverageCedar Water | None set | Within the limit |
+By source (2)— Tolt Water, Cedar Water
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 27 ug/LAverageCedar Water | None set | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 0.7 ug/LAverageCedar Water | 0 ug/LMCLG | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.38 NTUAverageCedar Water | None set | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
| TOCTotal organic carbon — a measure of organic material dissolved in the water. | 1.26 mg/LAverageTolt Water | None set | Detected — no federal limit |
+By source (2)— Tolt Water, Cedar Water
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 3.7 ug/LReported levelAt the tap | 0 ug/LMCLG | Within the limit |
| CopperA metal that enters water from corroding household plumbing. | 0.11 mg/LReported levelAt the tap | 1.3 mg/LMCLG | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0.4 ug/LAverageCedar Water | 0 ug/LMCLG | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
| BariumA metal from erosion of natural deposits and industrial discharge. | 1.5 ug/LAverageCedar Water | None set | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
Disinfectants
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| ChlorineA disinfectant added to drinking water to kill bacteria and viruses. | 0.91 mg/LAverageCedar Water | 4 mg/LMRDLG | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.7 mg/LAverageCedar Water | 4 mg/LMCLG | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.1 mg/LAverageCedar Water | 10 mg/LMCLG | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
People also ask about Bellevue, WA's water
+Is Bellevue, WA tap water safe to drink in 2024?
Every one of the 12 contaminants measured in Bellevue, WA'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 Bellevue, WA tap water?
12 contaminants were measured in Bellevue, WA's 2024 Consumer Confidence Report, spanning metals, disinfection byproducts, and inorganic chemicals. 7 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 Bellevue, WA'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 Bellevue, WA'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.