Is Federal Way tap water safe to drink?

Yes with good quality

Federal Way's tap water meets all EPA standards and scores well on our analysis. It is generally safe to drink though filtration can improve taste and provide extra precaution.

85/100
Purity Score
1
Issues Found
3.5 GPG
Hardness
Not detected
PFAS

1 Issue Detected in Federal Way

Arsenic Approaching Limit (0.1 mg/L)

EPA limit is 0.010 mg/L.

Arsenic info for Federal Way
Washington

9,800,398,023 · Groundwater Second Supply Pipeline

Federal Way, WA Water Quality Report

Low Risk Updated March 2026 99,037 residents
See Best Filters for Federal Way
85
Purity Score

Contaminant Levels

PFAS
ND
Lead
1.5 ppb
Nitrate
0.4 mg/L
Arsenic
0.1 mg/L
Hardness
3.5 gpg

Health Insights

  • 1
    Federal Way's water meets current EPA standards. Filtration can improve taste and provide extra safety.

Score

85 /100
Excellent
"Good" threshold (70)

Federal Way tap water is sourced from Groundwater Second Supply Pipeline and treated by Lakehaven Water and Sewer District. Overall purity score: 85/100 (Excellent). Updated for 2026.

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Best filters matched to Federal Way's 1 issue.

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Lead in Federal WayLead risk
Federal Way Hard WaterHardness data
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Federal Way Water FAQ

Is Federal Way WA tap water safe to drink in 2026?
Federal Way tap water meets EPA federal drinking water standards and scores 85/100 (Excellent) on PurityMap for 2026. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.
Does Federal Way WA use chlorine or chloramine for disinfection?
Federal Way uses chloramine as the primary disinfectant with a residual level of 0.8 ppm. Chloramine is harder to remove than free chlorine and requires a catalytic carbon or reverse osmosis filter. Standard Brita-style pitchers will NOT remove chloramine.
How hard is Federal Way WA water and what is the TDS level?
Federal Way water hardness is 3.5 grains per gallon (soft) with a TDS of 130 ppm (good). This level is unlikely to cause significant scale buildup in household plumbing.
Has PFAS been found in Federal Way WA drinking water?
Based on available EPA UCMR5 monitoring data as of 2026 PFAS have not been detected above EPA advisory levels in Federal Way drinking water.
What is the best water filter for Federal Way?
Based on Federal Way's water profile, we recommend the Clearly Filtered Water Pitcher. Federal Way water scores well overall. A pitcher filter provides extra precaution and improves taste for drinking and cooking.

Nearby Reports

BellinghamWashington — 85/100SeattleWashington — 85/100SpokaneWashington — 85/100TacomaWashington — 85/100VancouverWashington — 85/100BellevueWashington — 85/100

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Data Sources

  • EPA SDWIS
  • EWG Tap Water Database
  • Lakehaven Water and Sewer District CCR
  • USGS monitoring data

PurityMap compiles public data. Updated March 2026.

© 2026 PurityMap. For informational purposes only.

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