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States → EPA Region 6 — Tribal Water Systems

Community Water System · PWS 063500119

Nambe Pueblo

EPA Region 6 — Tribal Water Systems - drinking water served from groundwater sources to 800 people, tracked in EPA SDWIS and UCMR5.

800
People served
133
EPA violations
49
Health-based
Untested
UCMR5 result

The verdict

EPA records 133 drinking-water violations at Nambe Pueblo, 37% of them health-based.

133
Total EPA violations on record
37%
Health-based (MCL / treatment failure)
800
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Nambe Pueblo

Nambe Pueblo is a native american-owned community water system that delivers drinking water to 800 residents in EPA Region 6 — Tribal Water Systems through 202 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 133 total violations for this system , of which 49 (37%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 66 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 27 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 6 — 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
800
Total Violations
133
Health-Based Violations
49
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
202
School/Daycare
No
MCL Violations
33
Monitoring Violations
66
Treatment Tech Violations
16

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 27 2005
Groundwater Rule TT 16 2019
Combined Uranium MCL 13 2017
Coliform (TCR) MCL 12 2006
Consumer Confidence Rule Other 12 2010
Combined Uranium MR 8 2025
TTHM MR 8 2025
Total Haloacetic Acids (HAA5) MR 8 2025
Arsenic MCL 8 2020
Arsenic MR 6 2025
Lead and Copper Rule MR 3 2010
Groundwater Rule MR 3 2019
Nitrate-Nitrite MR 2 2021
Nitrate MR 1 2003
Public Notice Other 1 2020

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 Nambe Pueblo.

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 063500119 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 6 — Tribal Water Systems Drinking Water Authority

EPA Region 6 — 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 06 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
2025 Combined Uranium MR 8 SDWIS / 063500119 / 4006
2025 TTHM MR 8 SDWIS / 063500119 / 2950
2025 Total Haloacetic Acids (HAA5) MR 8 SDWIS / 063500119 / 2456
2025 Arsenic MR 6 SDWIS / 063500119 / 1005
2021 Nitrate-Nitrite MR 2 SDWIS / 063500119 / 1038
2020 Arsenic MCL 8 SDWIS / 063500119 / 1005
2020 Public Notice Other 1 SDWIS / 063500119 / 7500
2019 Groundwater Rule TT 16 SDWIS / 063500119 / 0700
2019 Groundwater Rule MR 3 SDWIS / 063500119 / 0700
2017 Combined Uranium MCL 13 SDWIS / 063500119 / 4006
2010 Consumer Confidence Rule Other 12 SDWIS / 063500119 / 7000
2010 Lead and Copper Rule MR 3 SDWIS / 063500119 / 5000
2006 Coliform (TCR) MCL 12 SDWIS / 063500119 / 3100
2005 Coliform (TCR) MR 27 SDWIS / 063500119 / 3100
2003 Nitrate MR 1 SDWIS / 063500119 / 1040

How Nambe Pueblo Compares

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

Metric Nambe Pueblo EPA Region 6 — Tribal Water Systems avg Federal benchmark
Total violations 133 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 49 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 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 6 — 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 Nambe Pueblo water safe to drink? ▼
Nambe Pueblo (PWS ID: 063500119) has 133 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 800 people using Groundwater sources.
How many people does Nambe Pueblo serve? ▼
Nambe Pueblo serves 800 people in EPA Region 6 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 202 service connections.
What type of violations does Nambe Pueblo have? ▼
Nambe Pueblo has 133 total violations: 49 health-based violations (MCL exceedances or treatment failures), 66 monitoring/reporting violations, and 16 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Nambe Pueblo water? ▼
No PFAS testing data is available for Nambe Pueblo under the EPA's UCMR5 monitoring program.
What water source does Nambe Pueblo use? ▼
Nambe Pueblo 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.