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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090400343

Tonto Apache

Payson, EPA Region 9 — Tribal Water Systems 85541 - drinking water served from surface water sources to 2,580 people, tracked in EPA SDWIS and UCMR5.

2,580
People served
169
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 169 drinking-water violations at Tonto Apache, 2% of them health-based.

169
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
2,580
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tonto Apache

Tonto Apache is a native american-owned community water system that delivers drinking water to 2,580 residents in Payson, EPA Region 9 — Tribal Water Systems through 71 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 169 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 81 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 23 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 9 — 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
2,580
Total Violations
169
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
71
School/Daycare
No
MCL Violations
4
Monitoring Violations
81
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 23 2016
Consumer Confidence Rule Other 9 2024
Chlorine MR 5 2025
Coliform (TCR) MCL 4 2007
Total Haloacetic Acids (HAA5) MR 4 2024
TTHM MR 4 2024
Lead and Copper Rule MR 3 2022
LEAD AND COPPER RULE REVISIONS RPT 3 2024
1,2,4-Trichlorobenzene MR 2 1996
Xylenes, Total MR 2 1996
DICHLOROMETHANE MR 2 1996
p-Dichlorobenzene MR 2 1996
Vinyl chloride MR 2 1996
1,1-Dichloroethylene MR 2 1996
trans-1,2-Dichloroethylene MR 2 1996
1,2-Dichloroethane MR 2 1996
1,1,1-Trichloroethane MR 2 1996
Carbon tetrachloride MR 2 1996
1,2-Dichloropropane MR 2 1996
Trichloroethylene MR 2 1996
1,1,2-Trichloroethane MR 2 1996
Tetrachloroethylene MR 2 1996
Benzene MR 2 1996
Toluene MR 2 1996
Ethylbenzene MR 2 1996
o-Dichlorobenzene MR 2 1996
cis-1,2-Dichloroethylene MR 2 1996
CHLOROBENZENE MR 2 1996
Styrene MR 2 1996

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 Tonto Apache.

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 090400343 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — 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 09 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 Chlorine MR 5 SDWIS / 090400343 / 0999
2024 Consumer Confidence Rule Other 9 SDWIS / 090400343 / 7000
2024 Total Haloacetic Acids (HAA5) MR 4 SDWIS / 090400343 / 2456
2024 TTHM MR 4 SDWIS / 090400343 / 2950
2024 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / 090400343 / 5200
2022 Lead and Copper Rule MR 3 SDWIS / 090400343 / 5000
2016 Coliform (TCR) MR 23 SDWIS / 090400343 / 3100
2007 Coliform (TCR) MCL 4 SDWIS / 090400343 / 3100
1996 1,2,4-Trichlorobenzene MR 2 SDWIS / 090400343 / 2378
1996 Xylenes, Total MR 2 SDWIS / 090400343 / 2955
1996 DICHLOROMETHANE MR 2 SDWIS / 090400343 / 2964
1996 p-Dichlorobenzene MR 2 SDWIS / 090400343 / 2969
1996 Vinyl chloride MR 2 SDWIS / 090400343 / 2976
1996 1,1-Dichloroethylene MR 2 SDWIS / 090400343 / 2977
1996 trans-1,2-Dichloroethylene MR 2 SDWIS / 090400343 / 2979

How Tonto Apache Compares

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

Metric Tonto Apache EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 169 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 2,580 - 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 9 — 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 Tonto Apache water safe to drink? ▼
Tonto Apache (PWS ID: 090400343) has 169 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,580 people using Surface Water sources.
How many people does Tonto Apache serve? ▼
Tonto Apache serves 2,580 people in Payson, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Surface Water water sources with 71 service connections.
What type of violations does Tonto Apache have? ▼
Tonto Apache has 169 total violations: 4 health-based violations (MCL exceedances or treatment failures), 81 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tonto Apache water? ▼
No PFAS testing data is available for Tonto Apache under the EPA's UCMR5 monitoring program.
What water source does Tonto Apache use? ▼
Tonto Apache uses Surface Water 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.