Community Water System · PWS IL0730100
Andover
Operator location Andover, Illinois - 0% of 314 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 565 served per SDWIS.
- 565
- People served (this PWS)
- 314
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Andover standing, high SDWIS violation third
0% of 314 recorded violations are health-based - lower-third health share (≤ 1%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 0% is lower-third health share (≤ 1%). Population rank #27,138 of 29,740 among systems serving 500+.
The verdict
Andover sits in the upper third of the sitemap cohort by violation count (314), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (565; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is only 0% - almost all of this trail is monitoring or reporting. No UCMR5 PFAS test appears for this system in this extract.
- #27,138 of 29,740
- Population · /systems
- #1,207 of 1,310
- Population · IL
- 314
- Total EPA violations on record
- 0%
- 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
- Local
- Connections
- 250
- County
- Henry
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 259
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 57 | 2005 |
| cis-1,2-Dichloroethylene | MR | 10 | 2004 |
| o-Dichlorobenzene | MR | 10 | 2004 |
| Trichloroethylene | MR | 10 | 2004 |
| Tetrachloroethylene | MR | 10 | 2004 |
| CHLOROBENZENE | MR | 10 | 2004 |
| Toluene | MR | 10 | 2004 |
| Ethylbenzene | MR | 10 | 2004 |
| Styrene | MR | 10 | 2004 |
| Xylenes, Total | MR | 10 | 2004 |
| p-Dichlorobenzene | MR | 10 | 2004 |
| trans-1,2-Dichloroethylene | MR | 10 | 2004 |
| 1,2-Dichloroethane | MR | 10 | 2004 |
| 1,2-Dichloropropane | MR | 10 | 2004 |
| Benzene | MR | 10 | 2004 |
| 1,1-Dichloroethylene | MR | 10 | 2004 |
| 1,1,1-Trichloroethane | MR | 10 | 2004 |
| Carbon tetrachloride | MR | 10 | 2004 |
| Chlorine | MR | 8 | 2004 |
| Nitrate | MR | 6 | 1993 |
| DICHLOROMETHANE | MR | 4 | 2004 |
| CYANIDE | MR | 4 | 2002 |
| 1,1,2-Trichloroethane | MR | 4 | 2004 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2004 |
| Consumer Confidence Rule | Other | 3 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
| Nitrite | MR | 1 | 2005 |
Violation Count vs. the National Corpus
Andover has 314 recorded EPA violations, 91% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 9% carry more. 0% of this system's own violations are health-based (0 of 314), and it ranks #27,138 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)
314 Higher than most more violations than 91% 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 Andover
0 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IL0730100.
Sources: EPA SDWIS · Illinois EPA, Bureau of Water
Nationwide peers
314 violations · 565 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Andover
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.