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Community Water System · PWS AZ0410064

Gw Saguaro Dist Water Co - las Quintas

Maricopa, Arizona 85138 - drinking water served from groundwater sources to 3,720 people, tracked in EPA SDWIS and UCMR5.

3,720
People served
204
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 204 drinking-water violations at Gw Saguaro Dist Water Co - las Quintas - above the Arizona per-system average.

204
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
3,720
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Gw Saguaro Dist Water Co - las Quintas

Gw Saguaro Dist Water Co - las Quintas is a private-owned community water system that delivers drinking water to 3,720 residents in Maricopa, Arizona (Pima County) through 1,240 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 204 total violations for this system , of which 0 (0%) 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 2023.

The most frequently cited contaminant at this system is Arsenic, recorded in 26 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

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%).

Gw Saguaro Dist Water Co - las Quintas's 204 violations sit above 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
3,720
Total Violations
204
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
1,240
County
Pima
School/Daycare
No
MCL Violations
0
Monitoring Violations
189
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MR 26 2016
Coliform (TCR) MR 22 2015
Chlorine MR 22 2022
Lead and Copper Rule MR 10 2023
Mercury MR 9 1990
Consumer Confidence Rule Other 5 2009
Revised Total Coliform Rule MON 4 2017
TTHM MR 3 2011
Total Haloacetic Acids (HAA5) MR 3 2011
Nitrate MR 3 2002
BHC-GAMMA MR 2 2002
2,4-D MR 2 2002
Atrazine MR 2 2002
Picloram MR 2 2002
Pentachlorophenol MR 2 2002
2,4,5-TP MR 2 2002
OXAMYL MR 2 2002
HEXACHLOROBENZENE MR 2 2002
Diquat MR 2 2002
Benzo(a)pyrene MR 2 2002
Endrin MR 2 2002
Hexachlorocyclopentadiene MR 2 2002
Di(2-ethylhexyl) adipate MR 2 2002
Glyphosate MR 2 2002
Endothall MR 2 2002
Di(2-ethylhexyl) phthalate MR 2 2002
LASSO MR 2 2002
Carbofuran MR 2 2002
Toxaphene MR 2 2002
Heptachlor epoxide MR 2 2002

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 116 samples detected PFAS.

Contaminant Date Result MRL Status
ADONA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFBS 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 6/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 6/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 6/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 6/17/2024 <2.00 ppt 2.00 ppt Not Detected
PFHxA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 6/17/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/17/2024 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 6/17/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 6/17/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 6/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/17/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 6/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 6/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 6/17/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 6/17/2024 <5.00 ppt 5.00 ppt Not Detected
PFHxA 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 4/17/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 4/17/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 4/17/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 4/17/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 4/17/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 4/17/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 4/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 4/17/2024 <20.00 ppt 20.00 ppt Not Detected
PFHxS 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 4/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 4/17/2024 <7.00 ppt 7.00 ppt Not Detected
PFOS 4/17/2024 <4.00 ppt 4.00 ppt Not Detected
PFDA 4/17/2024 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 4/17/2024 <5.00 ppt 5.00 ppt Not Detected
NMeFOSAA 4/17/2024 <6.00 ppt 6.00 ppt Not Detected
PFTA 4/17/2024 <8.00 ppt 8.00 ppt Not Detected
9Cl-PF3ONS 4/17/2024 <2.00 ppt 2.00 ppt Not Detected

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 Gw Saguaro Dist Water Co - las Quintas.

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 AZ0410064 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 Gw Saguaro Dist Water Co - las Quintas 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
2023 Lead and Copper Rule MR 10 SDWIS / AZ0410064 / 5000
2022 Chlorine MR 22 SDWIS / AZ0410064 / 0999
2019 Revised Total Coliform Rule RPT 2 SDWIS / AZ0410064 / 8000
2017 Revised Total Coliform Rule MON 4 SDWIS / AZ0410064 / 8000
2016 Arsenic MR 26 SDWIS / AZ0410064 / 1005
2015 Coliform (TCR) MR 22 SDWIS / AZ0410064 / 3100
2011 TTHM MR 3 SDWIS / AZ0410064 / 2950
2011 Total Haloacetic Acids (HAA5) MR 3 SDWIS / AZ0410064 / 2456
2009 Consumer Confidence Rule Other 5 SDWIS / AZ0410064 / 7000
2004 Radium-228 MR 1 SDWIS / AZ0410064 / 4030
2004 Radium-226 MR 1 SDWIS / AZ0410064 / 4020
2004 Combined Radium (-226 and -228) MR 1 SDWIS / AZ0410064 / 4010
2002 Nitrate MR 3 SDWIS / AZ0410064 / 1040
2002 BHC-GAMMA MR 2 SDWIS / AZ0410064 / 2010
2002 2,4-D MR 2 SDWIS / AZ0410064 / 2105

How Gw Saguaro Dist Water Co - las Quintas Compares

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

Metric Gw Saguaro Dist Water Co - las Quintas Arizona avg Federal benchmark
Total violations 204 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 3,720 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 Gw Saguaro Dist Water Co - las Quintas water safe to drink?
Gw Saguaro Dist Water Co - las Quintas (PWS ID: AZ0410064) has 204 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,720 people using Groundwater sources.
How many people does Gw Saguaro Dist Water Co - las Quintas serve?
Gw Saguaro Dist Water Co - las Quintas serves 3,720 people in Maricopa, Arizona. It is a Private-owned system using Groundwater water sources with 1,240 service connections.
What type of violations does Gw Saguaro Dist Water Co - las Quintas have?
Gw Saguaro Dist Water Co - las Quintas has 204 total violations: 0 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 Gw Saguaro Dist Water Co - las Quintas water?
No. Gw Saguaro Dist Water Co - las Quintas was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Gw Saguaro Dist Water Co - las Quintas use?
Gw Saguaro Dist Water Co - las Quintas 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
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.