Community Water System · PWS OK1021770
Adair Co RWD #5
Operator location Westville, Oklahoma - smaller served population (≤ 999) at 675 people served; 648 SDWIS violations on record from surface water sources.
- 675
- People served (this PWS)
- 648
- EPA violations (this PWS)
- 19
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Adair Co RWD #5 standing, high SDWIS violation third
675 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 3% is middle-third health share (≤ 23%). Population rank #24,813 of 29,740 among systems serving 500+.
The verdict
Adair Co RWD #5 sits in the upper third of the sitemap cohort by violation count (648), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (675; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 3% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #24,813 of 29,740
- Population · /systems
- #491 of 558
- Population · OK
- 648
- Total EPA violations on record
- 3%
- 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
- 624
- County
- Adair
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 600
- Treatment Tech Violations
- 19
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | MR | 393 | 2024 |
| CARBON, TOTAL | MR | 53 | 2025 |
| TTHM | MR | 36 | 2025 |
| Total Haloacetic Acids (HAA5) | MR | 34 | 2025 |
| Surface Water Treatment Rule | MR | 31 | 2004 |
| Coliform (TCR) | MR | 13 | 2009 |
| Interim Enhanced Surface Water Treatment Rule | Other | 12 | 2015 |
| Chlorine | MR | 11 | 2024 |
| Lead and Copper Rule | MR | 9 | 2024 |
| Revised Total Coliform Rule | MON | 8 | 2024 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 7 | 2010 |
| CARBON, TOTAL | TT | 7 | 2025 |
| Interim Enhanced Surface Water Treatment Rule | TT | 6 | 2024 |
| Consumer Confidence Rule | Other | 5 | 2023 |
| Nitrate-Nitrite | MR | 5 | 2023 |
| Surface Water Treatment Rule | TT | 4 | 1994 |
| Public Notice | Other | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 2 | 2024 |
Violation Count vs. the National Corpus
Adair Co RWD #5 has 648 recorded EPA violations, 97% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 3% carry more. 3% of this system's own violations are health-based (19 of 648), and it ranks #24,813 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)
648 Higher than most more violations than 97% 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
Population served record for Adair Co RWD #5
EPA SDWIS lists 675 people served and 624 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
648 violations · 675 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 smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Adair Co RWD #5
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.