Water Quality in Mattoon, IL (61943)
EPA violation data for public water systems serving ZIP code 61943.
Active Health Violations
4 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 79% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
1,396
Population
20
Water Systems
22
Violations (5yr)
4
Health-Based
Location
Loading map...
Water Systems Serving This Area (20)
Mattoon
All resolvedCharleston
1 health-basedOakland
Hindsboro
All resolvedLakecrest Unit 5 Community
Walnut Point State Park 1
Walnut Pt Sp Well2 Concessions/Campgrnd
2 health-basedWalnut Point State Park 2
Walnut Point State Park
Oakland Christian Church
Oakland Christian Church
Walnut Point Sp Campgrd-Showerhse
1 health-basedMarathon Oil Co
Hebron Hils Campground
Marathon Oil Co
Hebron Hills Campground
Embarras Portal #1
Oakland National Bank
Oakland National Bank
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
Annual water quality report delivery requirement.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Used to disinfect water — generally safe at regulated levels.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jul 2025
How Does This Compare?
Mattoon (61943) has more violations than 79% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 22.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.