Community Water System · PWS IA9113071
Carlisle Water Supply
Operator location Carlisle, Iowa - 0% of 67 violations are health-based (lower-third health share (≤ 1%)); groundwater source; 4,170 served per SDWIS.
- 4,170
- People served (this PWS)
- 67
- EPA violations (this PWS)
- 0
- Health-based (this PWS)
- 1 PFAS
- UCMR5 (this PWS)
Carlisle Water Supply standing, mid SDWIS violation third
0% of 67 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%). UCMR5: lower-third PFAS panel (≤ 2 compounds). Population rank #8,640 of 29,740 among systems serving 500+.
The verdict
Carlisle Water Supply lands in the middle third by violation volume (67), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (4,170; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is only 0% - almost all of this trail is monitoring or reporting. UCMR5 detected 1 PFAS compound (lower-third PFAS panel (≤ 2 compounds)).
- #8,640 of 29,740
- Population · /systems
- #118 of 545
- Population · IA
- 67
- 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.
1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,850
- County
- Warren
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 46
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 16 | 2015 |
| Tetrachloroethylene | MR | 13 | 1993 |
| Nitrate | MR | 12 | 2023 |
| Revised Total Coliform Rule | MON | 5 | 2022 |
| Public Notice | Other | 3 | 2022 |
Violation Count vs. the National Corpus
Carlisle Water Supply has 67 recorded EPA violations, 64% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 36% carry more. 0% of this system's own violations are health-based (0 of 67), and it ranks #8,640 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)
67 Around the middle fewer violations than 36% 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. 1 of 29 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 11Cl-PF3OUdS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 4/14/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFDA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 4/14/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFHxS | 4/14/2025 | 3.10 ppt | 3.00 ppt | Detected |
| NMeFOSAA | 4/14/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 4/14/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| 8:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NEtFOSAA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
Health-based violations on Carlisle Water Supply
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 IA9113071.
Sources: EPA SDWIS
Nationwide peers
67 violations · 4,170 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 with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Carlisle Water Supply
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Iowa compares on the same EPA violation measures. Iowa 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.