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Community Water System · PWS AZ0410093

Sandario Water Company

Glendale, Arizona 85307 - drinking water served from groundwater sources to 870 people, tracked in EPA SDWIS and UCMR5.

870
People served
45
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 45 drinking-water violations at Sandario Water Company, 11% of them health-based - below the Arizona per-system average.

45
Total EPA violations on record
11%
Health-based (MCL / treatment failure)
870
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sandario Water Company

Sandario Water Company is a private-owned community water system that delivers drinking water to 870 residents in Glendale, Arizona (Pima County) through 348 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 45 total violations for this system , of which 5 (11%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 33 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 13 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%).

Sandario Water Company's 45 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
870
Total Violations
45
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
348
County
Pima
School/Daycare
No
MCL Violations
5
Monitoring Violations
33
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 13 2013
Chlorine MR 7 2015
Coliform (TCR) MCL 5 2015
Consumer Confidence Rule Other 4 2009
Revised Total Coliform Rule MON 3 2019
Public Notice Other 2 2020
CYANIDE MR 2 1998
Lead and Copper Rule MR 2 2019
Glyphosate MR 2 1998
Total Haloacetic Acids (HAA5) MR 1 2010
Pentachlorophenol MR 1 1998
Nitrate MR 1 2004
TTHM MR 1 2010

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 Sandario Water Company.

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 AZ0410093 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 Sandario Water Company 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
2020 Public Notice Other 2 SDWIS / AZ0410093 / 7500
2019 Revised Total Coliform Rule MON 3 SDWIS / AZ0410093 / 8000
2019 Lead and Copper Rule MR 2 SDWIS / AZ0410093 / 5000
2015 Chlorine MR 7 SDWIS / AZ0410093 / 0999
2015 Coliform (TCR) MCL 5 SDWIS / AZ0410093 / 3100
2013 Coliform (TCR) MR 13 SDWIS / AZ0410093 / 3100
2010 Total Haloacetic Acids (HAA5) MR 1 SDWIS / AZ0410093 / 2456
2010 TTHM MR 1 SDWIS / AZ0410093 / 2950
2009 Consumer Confidence Rule Other 4 SDWIS / AZ0410093 / 7000
2004 Nitrate MR 1 SDWIS / AZ0410093 / 1040
1998 CYANIDE MR 2 SDWIS / AZ0410093 / 1024
1998 Glyphosate MR 2 SDWIS / AZ0410093 / 2034
1998 Pentachlorophenol MR 1 SDWIS / AZ0410093 / 2326

How Sandario Water Company Compares

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

Metric Sandario Water Company Arizona avg Federal benchmark
Total violations 45 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 870 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 Sandario Water Company water safe to drink? ▼
Sandario Water Company (PWS ID: AZ0410093) has 45 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 870 people using Groundwater sources.
How many people does Sandario Water Company serve? ▼
Sandario Water Company serves 870 people in Glendale, Arizona. It is a Private-owned system using Groundwater water sources with 348 service connections.
What type of violations does Sandario Water Company have? ▼
Sandario Water Company has 45 total violations: 5 health-based violations (MCL exceedances or treatment failures), 33 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sandario Water Company water? ▼
No PFAS testing data is available for Sandario Water Company under the EPA's UCMR5 monitoring program.
What water source does Sandario Water Company use? ▼
Sandario Water Company 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.