PWSID
IL1194280
State
Illinois
City
COLLINSVILLE
Population served
29,500
Primary source
Groundwater
Score history
▼ 79 points — the score moved from 100 to 21 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 Aug 2024). Levels in parts per trillion (ppt).
PFOA
Perfluorooctanoic acid
18 ppt
limit 4 ppt
PFOS
Perfluorooctanesulfonic acid
8.9 ppt
limit 4 ppt
PFHxS
Perfluorohexanesulfonic acid
12 ppt
limit 10 ppt
PFHxA
22 ppt
limit —
PFPeA
21 ppt
limit —
PFBS
16 ppt
limit —
PFBA
13 ppt
limit —
PFHpA
13 ppt
limit —
Violations & enforcement
No violations are on record for this system in EPA’s SDWIS/ECHO data.
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.
Arsenic
1 station · latest Aug 2023
Copper
1 station · latest Aug 2023
Fluoride
1 station · latest Aug 2023
Manganese
1 station · latest Aug 2023
Uranium
1 station · latest Aug 2023
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 IL1194280 — 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.