Community Water System · PWS IL0430552
IL American-Dupage Utility
Operator location Godfrey, Illinois - 53% of 15 violations are health-based (upper-third health share (> 23%)); surface water source; 6,613 served per SDWIS.
- 6,613
- People served (this PWS)
- 15
- EPA violations (this PWS)
- 8
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
IL American-Dupage Utility standing, low SDWIS violation third
53% of 15 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 53% is upper-third health share (> 23%). Population rank #6,375 of 29,740 among systems serving 500+.
The verdict
IL American-Dupage Utility is in the lower third by violation count (15; lower-third violation load (≤ 21 violations)). A low count does not mean the system is unmonitored - monitoring and reporting violations still appear in SDWIS. Population served is large (6,613; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 53% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #6,375 of 29,740
- Population · /systems
- #302 of 1,310
- Population · IL
- 15
- Total EPA violations on record
- 53%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 1,111
- County
- DuPage
- School/Daycare
- No
- MCL Violations
- 8
- Monitoring Violations
- 6
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 8 | 2007 |
| Coliform (TCR) | MR | 4 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
| Lead and Copper Rule | MR | 1 | 1993 |
Violation Count vs. the National Corpus
IL American-Dupage Utility has 15 recorded EPA violations, 25% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 74% carry more. 53% of this system's own violations are health-based (8 of 15), and it ranks #6,375 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
15 Lower than most fewer violations than 74% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on IL American-Dupage Utility
8 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IL0430552.
Sources: EPA SDWIS · Illinois EPA, Bureau of Water
Nationwide peers
15 violations · 6,613 served: nearest cross-state SDWIS matches.
Cross-state systems with similarly light violation ledgers
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with IL American-Dupage Utility
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Illinois compares on the same EPA violation measures. Illinois systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.