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USFS ASNF BLACK MESA RANGER DISTRICT

PWS ID: AZ0409806 · OVERGAARD, Arizona 85933

USFS ASNF BLACK MESA RANGER DISTRICT serves 87 people in OVERGAARD, Arizona using Groundwater water sources. It has 72 recorded EPA violations, including 3 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: USFS ASNF BLACK MESA RANGER DISTRICT

USFS ASNF BLACK MESA RANGER DISTRICT is a federal-owned non-transient non-community water system that delivers drinking water to 87 residents in OVERGAARD, Arizona (Navajo County) through 40 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 72 total violations for this system , of which 3 (4%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 67 monitoring and reporting violations are on file. The most recent violation on record dates to 2013.

The most frequently cited contaminant at this system is Nitrate, recorded in 4 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 Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. USFS ASNF BLACK MESA RANGER DISTRICT's 72 violations sit below the Arizona average. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%). 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
87
Total Violations
72
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Federal
Connections
40
County
Navajo
School/Daycare
No
MCL Violations
3
Monitoring Violations
67
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 4 1999
Cadmium MR 4 1988
Coliform (TCR) MCL 3 2007
Coliform (TCR) MR 3 2010
trans-1,2-Dichloroethylene MR 2 1999
1,2-Dichloroethane MR 2 1999
Carbon tetrachloride MR 2 1999
1,2-Dichloropropane MR 2 1999
Trichloroethylene MR 2 1999
1,1,2-Trichloroethane MR 2 1999
CHLOROBENZENE MR 2 1999
Benzene MR 2 1999
Toluene MR 2 1999
Ethylbenzene MR 2 1999
1,2,4-Trichlorobenzene MR 2 1999
Xylenes, Total MR 2 1999
DICHLOROMETHANE MR 2 1999
1,1,1-Trichloroethane MR 2 1999
Styrene MR 2 1999
Lead and Copper Rule MR 2 2013
1,1-Dichloroethylene MR 2 1999
Fluoride MR 2 1988
Mercury MR 2 1988
Gross Alpha, Excl. Radon and U MR 2 1990
Arsenic MR 2 1988
Selenium MR 2 1988
p-Dichlorobenzene MR 2 1999
Tetrachloroethylene MR 2 1999
Chromium MR 2 1988
o-Dichlorobenzene MR 2 1999

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 USFS ASNF BLACK MESA RANGER DISTRICT.

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 AZ0409806 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arizona Drinking Water Authority

Arizona DEQ — Drinking Water Program is the primacy agency that licenses and inspects USFS ASNF BLACK MESA RANGER DISTRICT under EPA-delegated authority.

Open AZ regulator portal

Source: Arizona DEQ — Drinking Water Program

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
2013 Lead and Copper Rule MR 2 SDWIS / AZ0409806 / 5000
2010 Coliform (TCR) MR 3 SDWIS / AZ0409806 / 3100
2007 Coliform (TCR) MCL 3 SDWIS / AZ0409806 / 3100
1999 Nitrate MR 4 SDWIS / AZ0409806 / 1040
1999 trans-1,2-Dichloroethylene MR 2 SDWIS / AZ0409806 / 2979
1999 1,2-Dichloroethane MR 2 SDWIS / AZ0409806 / 2980
1999 Carbon tetrachloride MR 2 SDWIS / AZ0409806 / 2982
1999 1,2-Dichloropropane MR 2 SDWIS / AZ0409806 / 2983
1999 Trichloroethylene MR 2 SDWIS / AZ0409806 / 2984
1999 1,1,2-Trichloroethane MR 2 SDWIS / AZ0409806 / 2985
1999 CHLOROBENZENE MR 2 SDWIS / AZ0409806 / 2989
1999 Benzene MR 2 SDWIS / AZ0409806 / 2990
1999 Toluene MR 2 SDWIS / AZ0409806 / 2991
1999 Ethylbenzene MR 2 SDWIS / AZ0409806 / 2992
1999 1,2,4-Trichlorobenzene MR 2 SDWIS / AZ0409806 / 2378

How USFS ASNF BLACK MESA RANGER DISTRICT Compares

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

Metric USFS ASNF BLACK MESA RANGER DISTRICT Arizona avg Federal benchmark
Total violations 72 153.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 3 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 87 4,904 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.

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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is USFS ASNF BLACK MESA RANGER DISTRICT water safe to drink? ▼
USFS ASNF BLACK MESA RANGER DISTRICT (PWS ID: AZ0409806) has 72 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 87 people using Groundwater sources.
How many people does USFS ASNF BLACK MESA RANGER DISTRICT serve? ▼
USFS ASNF BLACK MESA RANGER DISTRICT serves 87 people in OVERGAARD, Arizona. It is a Federal-owned system using Groundwater water sources with 40 service connections.
What type of violations does USFS ASNF BLACK MESA RANGER DISTRICT have? ▼
USFS ASNF BLACK MESA RANGER DISTRICT has 72 total violations: 3 health-based violations (MCL exceedances or treatment failures), 67 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in USFS ASNF BLACK MESA RANGER DISTRICT water? ▼
No PFAS testing data is available for USFS ASNF BLACK MESA RANGER DISTRICT under the EPA's UCMR5 monitoring program.
What water source does USFS ASNF BLACK MESA RANGER DISTRICT use? ▼
USFS ASNF BLACK MESA RANGER DISTRICT uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.

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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.

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