Community Water System · PWS IL1610550
Port Byron
Operator location Port Byron, Illinois - 14% of 44 violations are health-based (middle-third health share (≤ 23%)); groundwater source; 1,678 served per SDWIS.
- 1,678
- People served (this PWS)
- 44
- EPA violations (this PWS)
- 6
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Port Byron standing, mid SDWIS violation third
14% of 44 recorded violations are health-based - middle-third health share (≤ 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). Population rank #15,012 of 29,740 among systems serving 500+.
The verdict
Port Byron lands in the middle third by violation volume (44), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,678 (mid served population (≤ 3,309)). Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #15,012 of 29,740
- Population · /systems
- #653 of 1,310
- Population · IL
- 44
- Total EPA violations on record
- 14%
- 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
- 498
- County
- Rock Island
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 20
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 10 | 2012 |
| Coliform (TCR) | MR | 7 | 1995 |
| Consumer Confidence Rule | Other | 6 | 2025 |
| Coliform (TCR) | MCL | 4 | 1991 |
| Lead and Copper Rule | TT | 2 | 1997 |
| Combined Radium (-226 and -228) | MR | 2 | 2008 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
Violation Count vs. the National Corpus
Port Byron has 44 recorded EPA violations, 53% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 46% carry more. 14% of this system's own violations are health-based (6 of 44), and it ranks #15,012 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)
44 Around the middle fewer violations than 46% 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 Port Byron
6 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for IL1610550.
Sources: EPA SDWIS · Illinois EPA, Bureau of Water
Nationwide peers
44 violations · 1,678 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Port Byron
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.