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Water system · PWSID WA5338100

KENNEWICK CITY OF

Kennewick, WA · ~118,164 people served

Check your exact address → Kennewick overview
48
Fair
PurityRadar safety score

PWSID

WA5338100

State

Washington

City

Kennewick

Population served

118,164

Primary source

Surface water

Score history

▼ 52 points — the score moved from 100 to 48 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 48

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Jan 2024). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

12 ppt

limit 4 ppt

Above EPA limit · 2.9×

PFOA

Perfluorooctanoic acid

4.3 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFHxS

Perfluorohexanesulfonic acid

11 ppt

limit 10 ppt

Above EPA limit · 1.1×

Lithium

9,380 ppt

limit —

No federal limit

PFPeA

6.8 ppt

limit —

No federal limit

PFBS

6.4 ppt

limit —

No federal limit

PFHxA

6.3 ppt

limit —

No federal limit

Violations & enforcement

5

Violations on record

0

Unaddressed

0

Health-based

5

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2023. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2023 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2023 Resolved
Other · EPA contaminant 7000 began Jul 2016 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2016 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2016 Resolved

Recent enforcement actions

  • State action · SOX Aug 2023
  • State action · SOX Aug 2023
  • State action · SOX Dec 2016
  • State action · SOX Dec 2016
  • State action · SOX Oct 2016

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Fluoride

1 station · latest Aug 2022

0.16 · max 0.18 mg/L · 4

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system WA5338100 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.