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States → EPA Region 7 — Tribal Water Systems

Community Water System · PWS 070000007

Omaha Tribe PWS

Operator location Macy, EPA Region 7 — Tribal Water Systems - upper-third violation load (> 74 violations) with 152 EPA violations; groundwater source; 1,800 served (PWS-level, not municipal population).

1,800
People served (this PWS)
152
EPA violations (this PWS)
22
Health-based (this PWS)
Untested
UCMR5 (this PWS)
Follow published updates (RSS)

Omaha Tribe PWS standing, high SDWIS violation third

152 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 14% is middle-third health share (≤ 23%). Population rank #14,418 of 29,740 among systems serving 500+.

The verdict

Omaha Tribe PWS sits in the upper third of the sitemap cohort by violation count (152), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,800 (mid served population (≤ 3,309)). Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.

#14,418 of 29,740
Population · /systems
#2 of 10
Population · 07
152
Total EPA violations on record
14%
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
Native American
Connections
400
School/Daycare
No
MCL Violations
11
Monitoring Violations
86
Treatment Tech Violations
11

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 38 2014
Consumer Confidence Rule Other 22 2022
Total Haloacetic Acids (HAA5) MR 17 2011
Coliform (TCR) MCL 11 2014
TTHM MR 11 2011
Groundwater Rule TT 9 2024
Groundwater Rule Other 8 2021
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 5 2013
Nitrate MR 5 2008
Revised Total Coliform Rule MON 4 2023
Nitrate-Nitrite MR 3 2012
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 2013
CYANIDE MR 2 2023
Lead and Copper Rule MR 1 2016

Violation Count vs. the National Corpus

Omaha Tribe PWS has 152 recorded EPA violations, 81% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 19% carry more. 14% of this system's own violations are health-based (22 of 152), and it ranks #14,418 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)

152 Higher than most more violations than 81% 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 Omaha Tribe PWS

152 violations on record for 070000007; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.

EPA SDWIS · PWS 070000007

Sources: EPA SDWIS

Nationwide peers

152 violations · 1,800 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

Cross-state systems near this population served

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Omaha Tribe PWS

Use this system's EPA-reported record as a starting filter, not a final verdict.

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