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Community Water System · PWS OK1021501

Lenapah Public Works Authority

Operator location Lenapah, Oklahoma - 81% of 520 violations are health-based (upper-third health share (> 23%)); surface water source; 298 served per SDWIS.

298
People served (this PWS)
520
EPA violations (this PWS)
422
Health-based (this PWS)
Untested
UCMR5 (this PWS)
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Lenapah Public Works Authority standing, high SDWIS violation third

81% of 520 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 81% is upper-third health share (> 23%).

The verdict

Lenapah Public Works Authority sits in the upper third of the sitemap cohort by violation count (520), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (298; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 81% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.

520
Total EPA violations on record
81%
Health-based (MCL / treatment failure)
298
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
145
County
Nowata
School/Daycare
No
MCL Violations
353
Monitoring Violations
63
Treatment Tech Violations
69

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 312 2023
CARBON, TOTAL TT 51 2007
Total Haloacetic Acids (HAA5) MCL 32 2005
Interim Enhanced Surface Water Treatment Rule MR 17 2020
Interim Enhanced Surface Water Treatment Rule TT 14 2019
Nitrate-Nitrite MR 10 2008
Coliform (TCR) MCL 9 1998
CARBON, TOTAL MR 8 2004
Consumer Confidence Rule Other 7 2017
TTHM MR 6 2023
Chlorine MR 5 2018
Revised Total Coliform Rule MON 5 2018
Surface Water Treatment Rule TT 4 2001
Lead and Copper Rule MR 3 2013
Atrazine MR 3 2013
Surface Water Treatment Rule MR 2 1999
2,4-D MR 2 2011
Coliform (TCR) MR 2 1997

Violation Count vs. the National Corpus

Lenapah Public Works Authority has 520 recorded EPA violations, 96% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 4% carry more. 81% of this system's own violations are health-based (422 of 520), 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)

520 Higher than most more violations than 96% 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 Lenapah Public Works Authority

422 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for OK1021501.

Sources: EPA SDWIS

Nationwide peers

520 violations · 298 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.

4 peers

What to do with Lenapah Public Works Authority

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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater