B
74

Good Water Quality

Dahlgren, IL 62828

Hamilton County · Population served: 4,817 · Data updated March 2026

Water Systems Serving This Area

🏔
DAHLGREN
Surface water · Pop. 859
PWSID: IL0650150
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HAMILTON COUNTY WATER DISTRICT
Surface water · Pop. 3,958
PWSID: IL0651000

PFAS / Forever Chemicals

1 detected All below limits
CompoundLevelEPA MCLHealth GuidelineStatus
PFBA6.0 pptNo standard500 pptUnregulated

Violation History (Last 5 Years)

9Total (5yr)
0Health-Based
9Major

Water Quality Summary

Understanding Your Water in Dahlgren

Tap water quality in Dahlgren, Illinois (62828) receives an overall grade of B (Good) with a score of 74 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is roughly in line with the Illinois state average of 74. The area is served by 2 water systems providing water to approximately 4,817 people, using surface water sources. PFAS testing detected 1 compound, all currently below EPA limits.

Your Score 74/100 B
vs State 0 pts above Illinois avg (74)
vs National 1 pts below national avg (75)

What a Grade B Means

A score of 74/100 means the water in Dahlgren, IL is generally good and meets EPA standards, with only minor areas of concern. There may be low levels of detectable contaminants or a small number of non-critical violations. Most residents can feel comfortable with their tap water quality, though basic filtration can provide an extra layer of protection.

Surface water: sourced from rivers, lakes, or reservoirs

Common Questions

Frequently Asked Questions

Based on EPA data, tap water in Dahlgren, Illinois receives a grade of B (Good) with a score of 74/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.

ZIP code 62828 is served by 2 water systems using surface water sources, providing water to approximately 4,817 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.

No lead data is currently available for ZIP code 62828. This may mean lead testing results haven't been reported recently, or the serving water system uses monitoring waivers. You can request a free lead test kit from most water utilities or purchase a certified home testing kit.

1 PFAS compound were detected in water serving Dahlgren, Illinois, but all are currently below EPA limits. While levels are within regulatory standards, some health organizations recommend minimizing any PFAS exposure. Activated carbon or reverse osmosis filters can reduce PFAS levels.

Water systems serving Dahlgren, Illinois have received 9 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (PFAS), residents in Dahlgren, Illinois should consider: Reverse osmosis (RO) system — most effective for PFAS, lead, and other contaminants. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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