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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090400695

Salt River North Mesa

Scottsdale, EPA Region 9 — Tribal Water Systems 85256 - drinking water served from groundwater sources to 100 people, tracked in EPA SDWIS and UCMR5.

100
People served
239
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 239 drinking-water violations at Salt River North Mesa, 1% of them health-based.

239
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
100
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Salt River North Mesa

Salt River North Mesa is a native american-owned community water system that delivers drinking water to 100 residents in Scottsdale, EPA Region 9 — Tribal Water Systems through 19 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 239 total violations for this system , of which 2 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 196 monitoring and reporting violations are on file. The most recent violation on record dates to 2011.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 7 violations (Other). 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
100
Total Violations
239
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
19
School/Daycare
No
MCL Violations
2
Monitoring Violations
196
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 7 2007
Nitrate MR 4 2011
Arsenic MR 3 2004
Barium MR 3 2004
Cadmium MR 3 2004
CYANIDE MR 3 2004
Fluoride MR 3 2004
Mercury MR 3 2004
Selenium MR 3 2004
Beryllium, Total MR 3 2004
Thallium, Total MR 3 2004
Endrin MR 3 2004
Methoxychlor MR 3 2004
Toxaphene MR 3 2004
Dalapon MR 3 2004
Diquat MR 3 2004
Endothall MR 3 2004
Di(2-ethylhexyl) adipate MR 3 2004
OXAMYL MR 3 2004
Simazine MR 3 2004
Di(2-ethylhexyl) phthalate MR 3 2004
Picloram MR 3 2004
Dinoseb MR 3 2004
Hexachlorocyclopentadiene MR 3 2004
Carbofuran MR 3 2004
Atrazine MR 3 2004
LASSO MR 3 2004
2,3,7,8-TCDD MR 3 2004
Heptachlor MR 3 2004
2,4-D MR 3 2004

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 Salt River North Mesa.

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 090400695 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
2011 Nitrate MR 4 SDWIS / 090400695 / 1040
2008 Arsenic MCL 2 SDWIS / 090400695 / 1005
2007 Consumer Confidence Rule Other 7 SDWIS / 090400695 / 7000
2005 Total Haloacetic Acids (HAA5) MR 1 SDWIS / 090400695 / 2456
2005 TTHM MR 1 SDWIS / 090400695 / 2950
2004 Arsenic MR 3 SDWIS / 090400695 / 1005
2004 Barium MR 3 SDWIS / 090400695 / 1010
2004 Cadmium MR 3 SDWIS / 090400695 / 1015
2004 CYANIDE MR 3 SDWIS / 090400695 / 1024
2004 Fluoride MR 3 SDWIS / 090400695 / 1025
2004 Mercury MR 3 SDWIS / 090400695 / 1035
2004 Selenium MR 3 SDWIS / 090400695 / 1045
2004 Beryllium, Total MR 3 SDWIS / 090400695 / 1075
2004 Thallium, Total MR 3 SDWIS / 090400695 / 1085
2004 Endrin MR 3 SDWIS / 090400695 / 2005

How Salt River North Mesa Compares

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

Metric Salt River North Mesa EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 239 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 100 - 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 Salt River North Mesa water safe to drink? ▼
Salt River North Mesa (PWS ID: 090400695) has 239 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 100 people using Groundwater sources.
How many people does Salt River North Mesa serve? ▼
Salt River North Mesa serves 100 people in Scottsdale, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 19 service connections.
What type of violations does Salt River North Mesa have? ▼
Salt River North Mesa has 239 total violations: 2 health-based violations (MCL exceedances or treatment failures), 196 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Salt River North Mesa water? ▼
No PFAS testing data is available for Salt River North Mesa under the EPA's UCMR5 monitoring program.
What water source does Salt River North Mesa use? ▼
Salt River North Mesa 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.