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Community Water System · PWS AZ0411409

Valle Escondido

Maricopa, Arizona 85138 - drinking water served from groundwater sources to 405 people, tracked in EPA SDWIS and UCMR5.

405
People served
105
EPA violations
25
Health-based
Untested
UCMR5 result

The verdict

EPA records 105 drinking-water violations at Valle Escondido, 24% of them health-based - below the Arizona per-system average.

105
Total EPA violations on record
24%
Health-based (MCL / treatment failure)
405
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Valle Escondido

Valle Escondido is a public/private-owned community water system that delivers drinking water to 405 residents in Maricopa, Arizona (Pinal County) through 102 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 105 total violations for this system , of which 25 (24%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 52 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Chlorine, recorded in 21 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. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%).

Valle Escondido's 105 violations sit below the Arizona 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
405
Total Violations
105
Health-Based Violations
25
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
102
County
Pinal
School/Daycare
No
MCL Violations
17
Monitoring Violations
52
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 21 2022
Lead and Copper Rule MR 13 2023
Arsenic MCL 12 2024
Arsenic MR 8 2017
Public Notice Other 8 2024
Revised Total Coliform Rule RPT 6 2022
Revised Total Coliform Rule MCL 5 2022
Consumer Confidence Rule Other 4 2021
TTHM MR 4 2023
Total Haloacetic Acids (HAA5) MR 4 2023
LEAD AND COPPER RULE REVISIONS RPT 4 2024
LEAD AND COPPER RULE REVISIONS TT 4 2024
Groundwater Rule TT 4 2024
E. COLI MR 2 2022

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 Valle Escondido.

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 AZ0411409 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 Valle Escondido 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
2024 Arsenic MCL 12 SDWIS / AZ0411409 / 1005
2024 Public Notice Other 8 SDWIS / AZ0411409 / 7500
2024 LEAD AND COPPER RULE REVISIONS RPT 4 SDWIS / AZ0411409 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 4 SDWIS / AZ0411409 / 5200
2024 Groundwater Rule TT 4 SDWIS / AZ0411409 / 0700
2023 Lead and Copper Rule MR 13 SDWIS / AZ0411409 / 5000
2023 TTHM MR 4 SDWIS / AZ0411409 / 2950
2023 Total Haloacetic Acids (HAA5) MR 4 SDWIS / AZ0411409 / 2456
2022 Chlorine MR 21 SDWIS / AZ0411409 / 0999
2022 Revised Total Coliform Rule RPT 6 SDWIS / AZ0411409 / 8000
2022 Revised Total Coliform Rule MCL 5 SDWIS / AZ0411409 / 8000
2022 E. COLI MR 2 SDWIS / AZ0411409 / 3014
2021 Consumer Confidence Rule Other 4 SDWIS / AZ0411409 / 7000
2017 Arsenic MR 8 SDWIS / AZ0411409 / 1005

How Valle Escondido Compares

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

Metric Valle Escondido Arizona avg Federal benchmark
Total violations 105 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 25 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 405 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 (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 Valle Escondido water safe to drink? ▼
Valle Escondido (PWS ID: AZ0411409) has 105 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 405 people using Groundwater sources.
How many people does Valle Escondido serve? ▼
Valle Escondido serves 405 people in Maricopa, Arizona. It is a Public/Private-owned system using Groundwater water sources with 102 service connections.
What type of violations does Valle Escondido have? ▼
Valle Escondido has 105 total violations: 25 health-based violations (MCL exceedances or treatment failures), 52 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Valle Escondido water? ▼
No PFAS testing data is available for Valle Escondido under the EPA's UCMR5 monitoring program.
What water source does Valle Escondido use? ▼
Valle Escondido 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.