PWSID
WA5356300
State
Washington
City
Moses Lake
Population served
32,428
Primary source
Groundwater
Score history
▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.
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 2025). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
11 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
3.3 ppt
limit 10 ppt
Lithium
29,300 ppt
limit —
PFHxA
7.3 ppt
limit —
PFPeS
5.3 ppt
limit —
PFBS
4.4 ppt
limit —
Violations & enforcement
161
Violations on record
0
Unaddressed
0
Health-based
56
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Sep 2023. Official EPA record →
Recent enforcement actions
- State action · SOX Sep 2023
- State action · SOX Apr 2023
- State action · SOX Jan 2023
- State action · SOX Jun 2022
- State action · SOX Jul 2019
- State action · SOX Jan 2019
- State action · SOX Oct 2018
- State action · SOX Sep 2018
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.
Fluoride
1 station · latest Aug 2022
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 WA5356300 — 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.