F0/100
DIAMOND — Water Quality Report 2026
Serving 2,508 people · Illinois
Water Source
Groundwater
County
—
System ID
IL0630250
Violations
83
Contaminant Test Results
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2015.
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 DIAMOND
Is DIAMOND water safe to drink?
DIAMOND water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 83 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has DIAMOND detected?
1 contaminants were tested in DIAMOND's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does DIAMOND have any EPA violations?
Yes, DIAMOND has 83 EPA violation(s) on record, with the most recent in 2015. Violation types include MR, MCL. 20 are health-based violations.
How many people does DIAMOND serve?
DIAMOND serves approximately 2,508 people, Illinois. The system provides water to 1 community: Diamond.
What type of water does DIAMOND provide?
DIAMOND sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is IL0630250.
How does DIAMOND compare to other utilities in Illinois?
DIAMOND scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Illinois state page for a full comparison of water systems.