Community Water System · PWS OK2004105
Lincoln Co Rw & Sewer Dist 4
Operator location Agra, Oklahoma - upper-third violation load (> 74 violations) with 90 EPA violations; surface water source; 2,525 served (PWS-level, not municipal population).
- 2,525
- People served (this PWS)
- 90
- EPA violations (this PWS)
- 5
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Lincoln Co Rw & Sewer Dist 4 standing, high SDWIS violation third
90 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 6% is middle-third health share (≤ 23%). Population rank #11,795 of 29,740 among systems serving 500+.
The verdict
Lincoln Co Rw & Sewer Dist 4 sits in the upper third of the sitemap cohort by violation count (90), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,525 (mid served population (≤ 3,309)). Health-based share is 6% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #11,795 of 29,740
- Population · /systems
- #200 of 558
- Population · OK
- 90
- Total EPA violations on record
- 6%
- 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
- 1,052
- County
- Lincoln
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 64
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 18 | 2012 |
| Nitrate-Nitrite | MR | 16 | 2023 |
| E. COLI | MR | 11 | 2021 |
| Coliform (TCR) | MCL | 5 | 2012 |
| Chlorine | MR | 4 | 2017 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 2004 |
| Combined Uranium | MR | 3 | 2004 |
| Nitrite | MR | 3 | 2020 |
| Consumer Confidence Rule | Other | 3 | 2025 |
| Combined Radium (-226 and -228) | MR | 3 | 2004 |
| Gross Beta Particle Activity | MR | 3 | 2004 |
Violation Count vs. the National Corpus
Lincoln Co Rw & Sewer Dist 4 has 90 recorded EPA violations, 71% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 29% carry more. 6% of this system's own violations are health-based (5 of 90), and it ranks #11,795 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)
90 Around the middle fewer violations than 29% 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
SDWIS compliance record for Lincoln Co Rw & Sewer Dist 4
90 violations on record for OK2004105; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS
Nationwide peers
90 violations · 2,525 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Lincoln Co Rw & Sewer Dist 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.