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TONTO HILLS DWID

PWS ID: AZ0407076 · CAVE CREEK, Arizona 85331

TONTO HILLS DWID serves 350 people in CAVE CREEK, Arizona using Surface Water water sources. It has 245 recorded EPA violations, including 7 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: TONTO HILLS DWID

TONTO HILLS DWID is a private-owned community water system that delivers drinking water to 350 residents in CAVE CREEK, Arizona (Maricopa County) through 150 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 245 total violations for this system , of which 7 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 189 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 Chlorine, recorded in 38 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. TONTO HILLS DWID's 245 violations sit above 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
350
Total Violations
245
Health-Based Violations
7
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
150
County
Maricopa
School/Daycare
No
MCL Violations
7
Monitoring Violations
189
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 38 2025
Surface Water Treatment Rule MR 24 2025
Coliform (TCR) MR 21 2015
Lead and Copper Rule MR 10 2024
Consumer Confidence Rule Other 8 2012
Total Haloacetic Acids (HAA5) MR 5 2017
TTHM MR 5 2017
Nitrate MR 4 2004
Arsenic MR 3 1992
Fluoride MR 3 1992
o-Dichlorobenzene MR 2 1998
trans-1,2-Dichloroethylene MR 2 1998
1,1,2-Trichloroethane MR 2 1998
Tetrachloroethylene MR 2 1998
Toluene MR 2 1998
Ethylbenzene MR 2 1998
Glyphosate MR 2 1998
OXAMYL MR 2 1998
Coliform (TCR) MCL 2 2014
Mercury MR 2 1989
Fluoride MCL 2 1981
CHLOROBENZENE MR 2 1998
Barium MR 2 1989
cis-1,2-Dichloroethylene MR 2 1998
Cadmium MR 2 1989
Chromium MR 2 1989
Selenium MR 2 1989
DICHLOROMETHANE MR 2 1998
1,2-Dichloropropane MR 2 1998
Di(2-ethylhexyl) adipate MR 2 1998

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 HILLS DWID.

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 AZ0407076 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 TONTO HILLS DWID 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
2025 Chlorine MR 38 SDWIS / AZ0407076 / 0999
2025 Surface Water Treatment Rule MR 24 SDWIS / AZ0407076 / 0200
2025 Revised Total Coliform Rule RPT 2 SDWIS / AZ0407076 / 8000
2025 Public Notice Other 1 SDWIS / AZ0407076 / 7500
2024 Lead and Copper Rule MR 10 SDWIS / AZ0407076 / 5000
2017 Total Haloacetic Acids (HAA5) MR 5 SDWIS / AZ0407076 / 2456
2017 TTHM MR 5 SDWIS / AZ0407076 / 2950
2015 Coliform (TCR) MR 21 SDWIS / AZ0407076 / 3100
2014 Coliform (TCR) MCL 2 SDWIS / AZ0407076 / 3100
2012 Consumer Confidence Rule Other 8 SDWIS / AZ0407076 / 7000
2006 TTHM MCL 1 SDWIS / AZ0407076 / 2950
2004 Nitrate MR 4 SDWIS / AZ0407076 / 1040
2002 Gross Alpha, Excl. Radon and U MCL 1 SDWIS / AZ0407076 / 4000
2002 Combined Radium (-226 and -228) MCL 1 SDWIS / AZ0407076 / 4010
1998 o-Dichlorobenzene MR 2 SDWIS / AZ0407076 / 2968

How TONTO HILLS DWID Compares

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

Metric TONTO HILLS DWID Arizona avg Federal benchmark
Total violations 245 153.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 7 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 350 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 TONTO HILLS DWID water safe to drink? ▼
TONTO HILLS DWID (PWS ID: AZ0407076) has 245 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 350 people using Surface Water sources.
How many people does TONTO HILLS DWID serve? ▼
TONTO HILLS DWID serves 350 people in CAVE CREEK, Arizona. It is a Private-owned system using Surface Water water sources with 150 service connections.
What type of violations does TONTO HILLS DWID have? ▼
TONTO HILLS DWID has 245 total violations: 7 health-based violations (MCL exceedances or treatment failures), 189 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in TONTO HILLS DWID water? ▼
No PFAS testing data is available for TONTO HILLS DWID under the EPA's UCMR5 monitoring program.
What water source does TONTO HILLS DWID use? ▼
TONTO HILLS DWID 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.

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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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