Community Water System · PWS IL1970250
Crest Hill
Operator location Crest Hill, Illinois - UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)) on this PWS; SDWIS lists 190 violations and 21,169 people served.
- 21,169
- People served (this PWS)
- 190
- EPA violations (this PWS)
- 29
- Health-based (this PWS)
- 7 PFAS
- UCMR5 (this PWS)
Crest Hill standing, high SDWIS violation third
UCMR5 detected 7 PFAS compounds - upper-third PFAS panel (> 4 compounds). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 15% is middle-third health share (≤ 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #2,586 of 29,740 among systems serving 500+.
The verdict
Crest Hill sits in the upper third of the sitemap cohort by violation count (190), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (21,169; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 15% (middle-third health share (≤ 23%)). UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #2,586 of 29,740
- Population · /systems
- #121 of 1,310
- Population · IL
- 190
- Total EPA violations on record
- 15%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 6,500
- County
- Will
- School/Daycare
- No
- MCL Violations
- 17
- Monitoring Violations
- 126
- Treatment Tech Violations
- 12
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 27 | 2021 |
| Chlorine | MR | 24 | 2021 |
| Coliform (TCR) | MCL | 17 | 2001 |
| Lead and Copper Rule | MR | 14 | 2024 |
| Lead and Copper Rule | TT | 12 | 2024 |
| TTHM | MR | 8 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2023 |
| Carbon tetrachloride | MR | 6 | 1992 |
| Trichloroethylene | MR | 6 | 1992 |
| Consumer Confidence Rule | Other | 6 | 2025 |
| Coliform (TCR) | MR | 5 | 1997 |
| Public Notice | Other | 5 | 2025 |
| p-Dichlorobenzene | MR | 4 | 1990 |
| 1,1-Dichloroethylene | MR | 4 | 1990 |
| 1,2-Dichloroethane | MR | 4 | 1990 |
| 1,1,1-Trichloroethane | MR | 4 | 1990 |
| Benzene | MR | 4 | 1990 |
| Combined Radium (-226 and -228) | MR | 4 | 2020 |
| CYANIDE | MR | 3 | 2020 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1977 |
Violation Count vs. the National Corpus
Crest Hill has 190 recorded EPA violations, 85% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 15% carry more. 15% of this system's own violations are health-based (29 of 190), and it ranks #2,586 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)
190 Higher than most more violations than 85% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 68 of 406 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFMPA | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/12/2023 | 12.50 ppt | 5.00 ppt | Detected |
| 6:2 FTS | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 6/12/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFPeA | 6/12/2023 | 17.30 ppt | 3.00 ppt | Detected |
| PFMBA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 6/12/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 4:2 FTS | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 6/12/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFBS | 6/12/2023 | 27.80 ppt | 3.00 ppt | Detected |
| PFHpA | 6/12/2023 | 10.00 ppt | 3.00 ppt | Detected |
| PFHxS | 6/12/2023 | 5.10 ppt | 3.00 ppt | Detected |
| NMeFOSAA | 6/12/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/12/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFTrDA | 6/12/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFNA | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 6/12/2023 | 11.10 ppt | 4.00 ppt | Detected |
| PFDA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 6/12/2023 | 15.10 ppt | 3.00 ppt | Detected |
| NEtFOSAA | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDoA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 6/12/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFPeS | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 6/12/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFDA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 6/12/2023 | 3.50 ppt | 3.00 ppt | Detected |
| PFPeA | 6/12/2023 | 4.90 ppt | 3.00 ppt | Detected |
| PFMPA | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| ADONA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/12/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| HFPO-DA | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFNA | 6/12/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 6/12/2023 | 9.90 ppt | 3.00 ppt | Detected |
| PFHpA | 6/12/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
UCMR5 PFAS record for Crest Hill
Open EPA SDWIS federal reports for PWS IL1970250 to cross-check UCMR5 detections and violation codes; state primacy agencies enforce the Safe Drinking Water Act locally.
Sources: EPA SDWIS · Illinois EPA, Bureau of Water
Nationwide peers
190 violations · 21,169 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 similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Crest Hill
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.