Community Water System · PWS OK3005913
Pawnee Co RWD #4
Operator location Pawnee, Oklahoma - 75% of 231 violations are health-based (upper-third health share (> 23%)); surface water source; 415 served per SDWIS.
- 415
- People served (this PWS)
- 231
- EPA violations (this PWS)
- 174
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Pawnee Co RWD #4 standing, high SDWIS violation third
75% of 231 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 75% is upper-third health share (> 23%).
The verdict
Pawnee Co RWD #4 sits in the upper third of the sitemap cohort by violation count (231), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (415; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 75% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 231
- Total EPA violations on record
- 75%
- Health-based (MCL / treatment failure)
- 415
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
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
- 372
- County
- Pawnee
- School/Daycare
- No
- MCL Violations
- 174
- Monitoring Violations
- 51
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 116 | 2023 |
| Total Haloacetic Acids (HAA5) | MCL | 50 | 2021 |
| Chlorine | MR | 16 | 2022 |
| Revised Total Coliform Rule | MON | 8 | 2022 |
| Lead and Copper Rule | MR | 8 | 2019 |
| Coliform (TCR) | MCL | 8 | 2008 |
| Coliform (TCR) | MR | 7 | 2004 |
| Consumer Confidence Rule | Other | 6 | 2008 |
| TTHM | MR | 6 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2020 |
Violation Count vs. the National Corpus
Pawnee Co RWD #4 has 231 recorded EPA violations, 87% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 13% carry more. 75% of this system's own violations are health-based (174 of 231), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
231 Higher than most more violations than 87% 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 Pawnee Co RWD #4
174 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OK3005913.
Sources: EPA SDWIS
Nationwide peers
231 violations · 415 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.
What to do with Pawnee Co RWD #4
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Oklahoma compares on the same EPA violation measures. Oklahoma 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.