Community Water System · PWS IL1310500
New Windsor
Operator location New Windsor, Illinois - smaller served population (≤ 999) at 740 people served; 112 SDWIS violations on record from groundwater sources.
- 740
- People served (this PWS)
- 112
- EPA violations (this PWS)
- 24
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
New Windsor standing, high SDWIS violation third
740 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 21% is middle-third health share (≤ 23%). Population rank #23,646 of 29,740 among systems serving 500+.
The verdict
New Windsor sits in the upper third of the sitemap cohort by violation count (112), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (740; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 21% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #23,646 of 29,740
- Population · /systems
- #1,063 of 1,310
- Population · IL
- 112
- Total EPA violations on record
- 21%
- 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
- 345
- County
- Mercer
- School/Daycare
- No
- MCL Violations
- 18
- Monitoring Violations
- 49
- Treatment Tech Violations
- 6
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 21 | 2015 |
| Chlorine | MR | 14 | 2018 |
| Coliform (TCR) | MCL | 12 | 2015 |
| Public Notice | Other | 10 | 2025 |
| Lead and Copper Rule | MR | 9 | 2023 |
| Revised Total Coliform Rule | MCL | 6 | 2018 |
| Revised Total Coliform Rule | MON | 4 | 2017 |
| Revised Total Coliform Rule | TT | 4 | 2018 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2025 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| Consumer Confidence Rule | Other | 1 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
Violation Count vs. the National Corpus
New Windsor has 112 recorded EPA violations, 75% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 24% carry more. 21% of this system's own violations are health-based (24 of 112), and it ranks #23,646 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)
112 Higher than most more violations than 75% 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
Population served record for New Windsor
EPA SDWIS lists 740 people served and 345 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Illinois EPA, Bureau of Water
Nationwide peers
112 violations · 740 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 New Windsor
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.