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States → EPA Region 7 — Tribal Water Systems

Community Water System · PWS 070000007

Omaha Tribe PWS

Macy, EPA Region 7 — Tribal Water Systems 68039 - drinking water served from groundwater sources to 1,800 people, tracked in EPA SDWIS and UCMR5.

1,800
People served
152
EPA violations
22
Health-based
Untested
UCMR5 result

The verdict

EPA records 152 drinking-water violations at Omaha Tribe PWS, 14% of them health-based.

152
Total EPA violations on record
14%
Health-based (MCL / treatment failure)
1,800
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Omaha Tribe PWS

Omaha Tribe PWS is a native american-owned community water system that delivers drinking water to 1,800 residents in Macy, EPA Region 7 — Tribal Water Systems through 400 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 152 total violations for this system , of which 22 (14%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 86 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 38 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 7 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,800
Total Violations
152
Health-Based Violations
22
Water Source
Groundwater

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

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Omaha Tribe PWS.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID 070000007 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 7 — Tribal Water Systems Drinking Water Authority

EPA Region 7 — Tribal Water Systems's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 07 regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Groundwater Rule TT 9 SDWIS / 070000007 / 0700
2023 Revised Total Coliform Rule MON 4 SDWIS / 070000007 / 8000
2023 CYANIDE MR 2 SDWIS / 070000007 / 1024
2022 Consumer Confidence Rule Other 22 SDWIS / 070000007 / 7000
2021 Groundwater Rule Other 8 SDWIS / 070000007 / 0700
2016 Lead and Copper Rule MR 1 SDWIS / 070000007 / 5000
2014 Coliform (TCR) MR 38 SDWIS / 070000007 / 3100
2014 Coliform (TCR) MCL 11 SDWIS / 070000007 / 3100
2013 Stage 2 Disinfectants and Disinfection Byproducts Rule MR 5 SDWIS / 070000007 / 0600
2013 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 2 SDWIS / 070000007 / 0400
2012 Nitrate-Nitrite MR 3 SDWIS / 070000007 / 1038
2011 Total Haloacetic Acids (HAA5) MR 17 SDWIS / 070000007 / 2456
2011 TTHM MR 11 SDWIS / 070000007 / 2950
2008 Nitrate MR 5 SDWIS / 070000007 / 1040

How Omaha Tribe PWS Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Omaha Tribe PWS EPA Region 7 — Tribal Water Systems avg Federal benchmark
Total violations 152 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 22 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,800 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 7 — Tribal Water Systems.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Omaha Tribe PWS water safe to drink? ▼
Omaha Tribe PWS (PWS ID: 070000007) has 152 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,800 people using Groundwater sources.
How many people does Omaha Tribe PWS serve? ▼
Omaha Tribe PWS serves 1,800 people in Macy, EPA Region 7 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 400 service connections.
What type of violations does Omaha Tribe PWS have? ▼
Omaha Tribe PWS has 152 total violations: 22 health-based violations (MCL exceedances or treatment failures), 86 monitoring/reporting violations, and 11 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Omaha Tribe PWS water? ▼
No PFAS testing data is available for Omaha Tribe PWS under the EPA's UCMR5 monitoring program.
What water source does Omaha Tribe PWS use? ▼
Omaha Tribe PWS uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

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

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.