Community Water System · PWS NE3110102
Ogallala, City Of
Operator location Ogallala, Nebraska - 99% of 99 violations are health-based (upper-third health share (> 23%)); groundwater source; 4,878 served per SDWIS.
- 4,878
- People served (this PWS)
- 99
- EPA violations (this PWS)
- 98
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Ogallala, City Of standing, high SDWIS violation third
99% of 99 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 99% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #7,859 of 29,740 among systems serving 500+.
The verdict
Ogallala, City Of sits in the upper third of the sitemap cohort by violation count (99), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (4,878; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 99% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #7,859 of 29,740
- Population · /systems
- #32 of 250
- Population · NE
- 99
- Total EPA violations on record
- 99%
- 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
- 2,333
- County
- Keith
- School/Daycare
- No
- MCL Violations
- 98
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 93 | 2010 |
| Trichloroethylene | MCL | 5 | 1989 |
Violation Count vs. the National Corpus
Ogallala, City Of has 99 recorded EPA violations, 73% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 27% carry more. 99% of this system's own violations are health-based (98 of 99), and it ranks #7,859 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)
99 Around the middle fewer violations than 27% 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 406 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHpS | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 5/8/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 5/8/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 5/8/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 5/8/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 5/8/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 5/8/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 5/8/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 5/8/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFDA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 5/8/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 5/8/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 5/8/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 5/8/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 5/8/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 5/8/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxS | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 4/23/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFDoA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFNA | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 4/23/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 4/23/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFOS | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 4:2 FTS | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 4/23/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/23/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 6:2 FTS | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
Health-based violations on Ogallala, City Of
98 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NE3110102.
Sources: EPA SDWIS
Nationwide peers
99 violations · 4,878 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 Ogallala, City Of
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Nebraska compares on the same EPA violation measures. Nebraska 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.