Tap Water Quality Report
Tap water quality in FEDERAL WAY, Washington
Tap water in FEDERAL WAY, Washington receives a grade of F (52/100) from TapWaterSafety.org. It's served by LAKEHAVEN WATER AND SEWER DISTRICT. The most significant water quality concerns are: PFAS contamination; Total PFOS and PFOA significantly above health guideline; Arsenic significantly above health guideline; Perfluorohexane sulfonate (PFHXS) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in FEDERAL WAY's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving FEDERAL WAY.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Total PFOS and PFOA significantly above health guideline
Moderate concernTotal PFOS and PFOA detected at 5.81 ppt, 830x above the EWG health guideline of 0.007 ppt.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.77 ppb, 693x above the EWG health guideline of 0.004 ppb.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.554 ppt, 554x above the EWG health guideline of 0.001 ppt.
EPA compliance record
Official U.S. EPA records for LAKEHAVEN WATER AND SEWER DISTRICT (system ID WA5341997) 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.
Recommended filters for FEDERAL WAY
Filters matched to the specific contaminants in FEDERAL WAY's water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
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 FEDERAL WAY'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 |
|---|---|---|---|---|---|---|---|---|
| Total PFOS and PFOA PFAS |
5.81 ppt | 0.007 | — | 100 | 100 | 0.007 | — | 830× over |
| Arsenic Heavy metal |
2.77 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 693× over |
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.554 ppt | 0.001 | 10.0 | — | — | — | — | 554× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
12.2 ppb | 0.06 | — | — | — | — | — | 203× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
14.4 ppb | 0.15 | 80.0 | 100 | — | — | — | 96× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
8.35 ppb | 0.1 | 60.0 | 60 | — | — | — | 83× over |
| Trichloroacetic acid Disinfection byproduct |
4.0 ppb | 0.1 | — | — | — | — | — | 40× over |
| Bromodichloromethane Disinfection byproduct |
1.73 ppb | 0.06 | — | — | — | — | — | 29× over |
| Chloroform Disinfection byproduct |
10.2 ppb | 0.4 | — | — | — | — | — | 26× over |
| Dichloroacetic acid Disinfection byproduct |
4.19 ppb | 0.2 | — | — | — | — | — | 21× over |
| Nitrate and nitrite Inorganic |
1.38 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 9.8× over |
| Nitrate Inorganic |
0.645 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.6× over |
| Chromium (hexavalent) Heavy metal |
0.0845 ppb | 0.02 | — | — | — | — | — | 4.2× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.315 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 3.5× over |
| Dibromochloromethane Disinfection byproduct |
0.344 ppb | 0.1 | — | — | — | — | — | 3.4× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.735 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 2.5× over |
| Radium, combined (-226 and -228) Radiological |
0.06 pCi/L | 0.05 | 5.0 | — | — | — | — | 1.2× over |
| Manganese Heavy metal |
18.2 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Chlorate Disinfection byproduct |
17.2 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
1.3 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.00911 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
0.0658 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.832 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.565 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.547 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.234 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.214 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0709 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 1-Butanol Other |
0.406 ppb | — | — | — | — | — | — | Below guideline |
| PFOS + PFOA + PFHxS + PFNA PFAS |
5.75 ppt | — | — | 100 | 100 | 0.007 | — | 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 LAKEHAVEN WATER AND SEWER DISTRICT.