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Community Water System · PWS NN3500285

Alamo-Alamo Community

Alamo, Navajo Nation 87825 - drinking water served from groundwater sources to 785 people, tracked in EPA SDWIS and UCMR5.

785
People served
899
EPA violations
31
Health-based
Untested
UCMR5 result

The verdict

EPA records 899 drinking-water violations at Alamo-Alamo Community, 3% of them health-based - above the Navajo Nation per-system average.

899
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
785
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Alamo-Alamo Community

Alamo-Alamo Community is a native american-owned community water system that delivers drinking water to 785 residents in Alamo, Navajo Nation through 208 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 899 total violations for this system , of which 31 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 765 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 109 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Navajo Nation, EPA tracks 170 public water systems serving 167,275 people, with 29,535 cumulative violations and 1,366 health-based violations on record. About 100% of systems in the state carry at least one violation, and state-wide the average per system is 173.7 violations. Statewide, 13 of 13 UCMR5-tested systems have reported PFAS detections (100%).

Alamo-Alamo Community's 899 violations sit above the Navajo Nation average.

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
785
Total Violations
899
Health-Based Violations
31
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
208
School/Daycare
No
MCL Violations
31
Monitoring Violations
765
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 109 2015
Revised Total Coliform Rule MON 67 2025
Coliform (TCR) MCL 31 2013
Consumer Confidence Rule Other 29 2024
Nitrate MR 26 2020
Public Notice Other 25 2025
Nitrite MR 22 2020
Revised Total Coliform Rule RPT 16 2025
E. COLI MR 9 2017
Arsenic MR 8 2011
Barium MR 8 2011
Cadmium MR 8 2011
Chromium MR 8 2011
CYANIDE MR 8 2011
Mercury MR 8 2011
Selenium MR 8 2011
Antimony, Total MR 8 2011
Beryllium, Total MR 8 2011
Thallium, Total MR 8 2011
Endrin MR 8 2011
BHC-GAMMA MR 8 2011
Methoxychlor MR 8 2011
Toxaphene MR 8 2011
Dalapon MR 8 2011
Diquat MR 8 2011
Endothall MR 8 2011
Glyphosate MR 8 2011
Di(2-ethylhexyl) adipate MR 8 2011
OXAMYL MR 8 2011
Simazine MR 8 2011

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 Alamo-Alamo Community.

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 NN3500285 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Navajo Nation Drinking Water Authority

Navajo Nation'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 NN 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 Revised Total Coliform Rule MON 67 SDWIS / NN3500285 / 8000
2025 Public Notice Other 25 SDWIS / NN3500285 / 7500
2025 Revised Total Coliform Rule RPT 16 SDWIS / NN3500285 / 8000
2024 Consumer Confidence Rule Other 29 SDWIS / NN3500285 / 7000
2020 Nitrate MR 26 SDWIS / NN3500285 / 1040
2020 Nitrite MR 22 SDWIS / NN3500285 / 1041
2017 E. COLI MR 9 SDWIS / NN3500285 / 3014
2016 Revised Total Coliform Rule Other 2 SDWIS / NN3500285 / 8000
2015 Coliform (TCR) MR 109 SDWIS / NN3500285 / 3100
2013 Coliform (TCR) MCL 31 SDWIS / NN3500285 / 3100
2011 Arsenic MR 8 SDWIS / NN3500285 / 1005
2011 Barium MR 8 SDWIS / NN3500285 / 1010
2011 Cadmium MR 8 SDWIS / NN3500285 / 1015
2011 Chromium MR 8 SDWIS / NN3500285 / 1020
2011 CYANIDE MR 8 SDWIS / NN3500285 / 1024

How Alamo-Alamo Community Compares

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

Metric Alamo-Alamo Community Navajo Nation avg Federal benchmark
Total violations 899 173.7 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 31 8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 100% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 785 984 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 170 regulated public water systems in Navajo Nation.

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 Alamo-Alamo Community water safe to drink? ▼
Alamo-Alamo Community (PWS ID: NN3500285) has 899 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 785 people using Groundwater sources.
How many people does Alamo-Alamo Community serve? ▼
Alamo-Alamo Community serves 785 people in Alamo, Navajo Nation. It is a Native American-owned system using Groundwater water sources with 208 service connections.
What type of violations does Alamo-Alamo Community have? ▼
Alamo-Alamo Community has 899 total violations: 31 health-based violations (MCL exceedances or treatment failures), 765 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Alamo-Alamo Community water? ▼
No PFAS testing data is available for Alamo-Alamo Community under the EPA's UCMR5 monitoring program.
What water source does Alamo-Alamo Community use? ▼
Alamo-Alamo Community 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.