Drinking water quality · 2024
· Verified
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
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 23 ug/LAverageTolt Water | 60 ug/LMCL | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 27 ug/LAverageCedar Water | 80 ug/LMCL | 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 | Detected — no federal 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/LAverageTolt Water | 4 mg/LMRDLG | Within the limit |
+By source (2)— Tolt Water, Cedar 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/LAverageTolt Water | 10 mg/LMCLG | Within the limit |
+By source (2)— Tolt Water, Cedar Water
| |||
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.11 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 1.5 ug/LAverageCedar Water | 2000 ug/LMCLG | Within the limit |
+By source (2)— Cedar Water, Tolt Water
| |||
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 0.4 ug/LAverageCedar Water | 0 ug/LMCLG | Detected — no federal limit |
+By source (2)— Cedar Water, Tolt Water
| |||
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 3.7 ug/L90th percentileAt the tap | 0 ug/LMCLG | Detected — no federal limit |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| 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
| |||
| TurbidityA measure of cloudiness from suspended particles in the water. | 0.38 NTUAverageCedar Water | None set | Detected — no federal 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. 10 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.