Community Water System · PWS IA9774033
Sergeant Bluff Water Supply
Operator location Sergeant Bluff, Iowa - larger served population (> 3,309) at 5,015 people served; 22 SDWIS violations on record from groundwater sources.
- 5,015
- People served (this PWS)
- 22
- EPA violations (this PWS)
- 3
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Sergeant Bluff Water Supply standing, mid SDWIS violation third
5,015 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #7,700 of 29,740 among systems serving 500+.
The verdict
Sergeant Bluff Water Supply lands in the middle third by violation volume (22), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (5,015; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 14% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #7,700 of 29,740
- Population · /systems
- #101 of 545
- Population · IA
- 22
- 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
- 1,899
- County
- Woodbury
- School/Daycare
- No
- MCL Violations
- 3
- Monitoring Violations
- 4
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Revised Total Coliform Rule | MON | 4 | 2018 |
| Combined Radium (-226 and -228) | MCL | 3 | 1983 |
Violation Count vs. the National Corpus
Sergeant Bluff Water Supply has 22 recorded EPA violations, 34% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 65% carry more. 14% of this system's own violations are health-based (3 of 22), and it ranks #7,700 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)
22 Lower than most fewer violations than 65% 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. 0 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFUnA | 9/9/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 9/9/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 9/9/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 9/9/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/9/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 9/9/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 9/9/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 9/9/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 9/9/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFEESA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 9/9/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeS | 9/9/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/9/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFPeA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/9/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 9/9/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 9/9/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 9/9/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 9/9/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/9/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| 9Cl-PF3ONS | 3/5/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 3/5/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 3/5/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 3/5/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFNA | 3/5/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 3/5/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 3/5/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 3/5/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFOA | 3/5/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 3/5/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 3/5/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 3/5/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 3/5/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFMBA | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 3/5/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
Population served record for Sergeant Bluff Water Supply
EPA SDWIS lists 5,015 people served and 1,899 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
22 violations · 5,015 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 Sergeant Bluff 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.