B61/100
PETROLIA PWD — Water Quality Report 2026
Serving 1,275 people · Illinois
Water Source
Purchased Groundwater
County
—
System ID
IL1015350
Violations
11
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.44 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – December 31, 2023Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About PETROLIA PWD
Is PETROLIA PWD water safe to drink?
PETROLIA PWD water receives a grade of B (61/100), which is considered good. Out of 2 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has PETROLIA PWD detected?
2 contaminants were tested in PETROLIA PWD's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does PETROLIA PWD have any EPA violations?
Yes, PETROLIA PWD has 11 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, MCL, Other. 5 are health-based violations.
How many people does PETROLIA PWD serve?
PETROLIA PWD serves approximately 1,275 people, Illinois.
What type of water does PETROLIA PWD provide?
PETROLIA PWD sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL1015350.
How does PETROLIA PWD compare to other utilities in Illinois?
PETROLIA PWD scores 61/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Illinois state page for a full comparison of water systems.