Tap Water Quality Report
Tap water quality in Renton, Washington
Tap water in Renton, Washington receives a grade of B (80/100) from TapWaterSafety.org. It's served by 2 public water systems, primarily RENTON CITY OF. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Bromodichloromethane significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in Renton's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving Renton.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 7.86 ppb, 131x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 12.3 ppb, 82x above the EWG health guideline of 0.15 ppb.
Bromodichloromethane significantly above health guideline
Moderate concernBromodichloromethane detected at 3.14 ppb, 52x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 31.1 ppb, 311x above the EWG health guideline of 0.1 ppb.
EPA compliance record
Official U.S. EPA records for RENTON CITY OF (system ID WA5371850) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Water systems serving Renton
Renton is served by 2 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
RENTON CITY OF
- Haloacetic acids (HAA9) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
- Bromodichloromethane significantly above health guideline
SOOS CREEK WATER & SEWER DISTRICT
- Haloacetic acids (HAA9) significantly above health guideline
- Haloacetic acids (HAA5) significantly above health guideline
- Total trihalomethanes (TTHMs) significantly above health guideline
Recommended filters for Renton
Filters matched to the specific contaminants in Renton's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in Renton's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
33.0 ppb | 0.06 | — | — | — | — | — | 550× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
31.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 311× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
30.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 203× over |
| Trichloroacetic acid Disinfection byproduct |
16.3 ppb | 0.1 | — | — | — | — | — | 163× over |
| Chloroform Disinfection byproduct |
28.7 ppb | 0.4 | — | — | — | — | — | 72× over |
| Dichloroacetic acid Disinfection byproduct |
13.8 ppb | 0.2 | — | — | — | — | — | 69× over |
| Bromodichloromethane Disinfection byproduct |
3.14 ppb | 0.06 | — | — | — | — | — | 52× over |
| Dibromochloromethane Disinfection byproduct |
1.66 ppb | 0.1 | — | — | — | — | — | 17× over |
| Radium, combined (-226 and -228)* Radiological |
0.71 pCi/L | 0.05 | 5.0 | — | — | — | — | 14× over |
| Chromium (hexavalent) Heavy metal |
0.134 ppb | 0.02 | — | — | — | — | — | 6.7× over |
| Nitrate Inorganic |
0.73 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 5.2× over |
| Bromate* Disinfection byproduct |
0.352 ppb | 0.1 | 10.0 | 10 | 10 | 0.1 | — | 3.5× over |
| Bromochloroacetic acid* Disinfection byproduct |
0.0664 ppb | 0.02 | — | — | — | — | — | 3.3× over |
| Nitrate* Inorganic |
0.062 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Chlorate Disinfection byproduct |
44.0 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Chlorate* Disinfection byproduct |
16.1 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.734 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
2.25 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.03 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.5 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0701 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Germanium Other |
0.095 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.7 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from RENTON CITY OF.