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Community Water System · PWS AZ0410312

Sahuarita Water Company

Sahuarita, Arizona 85629 - drinking water served from groundwater sources to 18,178 people, tracked in EPA SDWIS and UCMR5.

18,178
People served
101
EPA violations
2
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 101 drinking-water violations at Sahuarita Water Company, 2% of them health-based - below the Arizona per-system average.

101
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
18,178
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sahuarita Water Company

Sahuarita Water Company is a public/private-owned community water system that delivers drinking water to 18,178 residents in Sahuarita, Arizona (Pima County) through 7,002 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 101 total violations for this system , of which 2 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 92 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 16 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%).

Sahuarita Water Company's 101 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
18,178
Total Violations
101
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
7,002
County
Pima
School/Daycare
No
MCL Violations
2
Monitoring Violations
92
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 16 2006
Consumer Confidence Rule Other 5 2013
Nitrate MR 5 2004
Total Haloacetic Acids (HAA5) MR 3 2008
Chlorine MR 3 2017
TTHM MR 3 2008
Coliform (TCR) MCL 2 2006
cis-1,2-Dichloroethylene MR 2 2002
Xylenes, Total MR 2 2002
o-Dichlorobenzene MR 2 2002
p-Dichlorobenzene MR 2 2002
1,1-Dichloroethylene MR 2 2002
trans-1,2-Dichloroethylene MR 2 2002
1,1,1-Trichloroethane MR 2 2002
Carbon tetrachloride MR 2 2002
CHLOROBENZENE MR 2 2002
Tetrachloroethylene MR 2 2002
Benzene MR 2 2002
Ethylbenzene MR 2 2002
1,2,4-Trichlorobenzene MR 2 2002
DICHLOROMETHANE MR 2 2002
1,2-Dichloroethane MR 2 2002
1,2-Dichloropropane MR 2 2002
1,1,2-Trichloroethane MR 2 2002
Styrene MR 2 2002
Toluene MR 2 2002
Trichloroethylene MR 2 2002
Fluoride MR 1 2004
Combined Uranium MR 1 2004
CYANIDE MR 1 1998

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.

Contaminant Date Result MRL Status
PFEESA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFMPA 5/15/2024 <4.00 ppt 4.00 ppt Not Detected
8:2 FTS 5/15/2024 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 5/15/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 5/15/2024 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 5/15/2024 <5.00 ppt 5.00 ppt Not Detected
ADONA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 5/15/2024 <2.00 ppt 2.00 ppt Not Detected
11Cl-PF3OUdS 5/15/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 5/15/2024 <2.00 ppt 2.00 ppt Not Detected
PFHxA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFOS 5/15/2024 <4.00 ppt 4.00 ppt Not Detected
PFMBA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 5/15/2024 <5.00 ppt 5.00 ppt Not Detected
PFTrDA 5/15/2024 <7.00 ppt 7.00 ppt Not Detected
PFTA 5/15/2024 <8.00 ppt 8.00 ppt Not Detected
PFDA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFOA 5/15/2024 <4.00 ppt 4.00 ppt Not Detected
PFBS 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 5/15/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 5/15/2024 <3.00 ppt 3.00 ppt Not Detected
PFPeS 5/15/2024 <4.00 ppt 4.00 ppt Not Detected
NFDHA 5/15/2024 <20.00 ppt 20.00 ppt Not Detected
NMeFOSAA 5/15/2024 <6.00 ppt 6.00 ppt Not Detected
PFTA 11/16/2023 <8.00 ppt 8.00 ppt Not Detected
ADONA 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFUnA 11/16/2023 <2.00 ppt 2.00 ppt Not Detected
PFHxA 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFDoA 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFDA 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFOA 11/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFOS 11/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFNA 11/16/2023 <4.00 ppt 4.00 ppt Not Detected
PFHxS 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFHpA 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
PFBS 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
NMeFOSAA 11/16/2023 <6.00 ppt 6.00 ppt Not Detected
NEtFOSAA 11/16/2023 <5.00 ppt 5.00 ppt Not Detected
PFHpS 11/16/2023 <3.00 ppt 3.00 ppt Not Detected
9Cl-PF3ONS 11/16/2023 <2.00 ppt 2.00 ppt Not Detected
PFTrDA 11/16/2023 <7.00 ppt 7.00 ppt Not Detected
HFPO-DA 11/16/2023 <5.00 ppt 5.00 ppt Not Detected
PFBA 11/16/2023 <5.00 ppt 5.00 ppt Not Detected
6:2 FTS 11/16/2023 <5.00 ppt 5.00 ppt Not Detected
4:2 FTS 11/16/2023 <3.00 ppt 3.00 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 Sahuarita 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 AZ0410312 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 Sahuarita 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
2017 Chlorine MR 3 SDWIS / AZ0410312 / 0999
2013 Consumer Confidence Rule Other 5 SDWIS / AZ0410312 / 7000
2008 Total Haloacetic Acids (HAA5) MR 3 SDWIS / AZ0410312 / 2456
2008 TTHM MR 3 SDWIS / AZ0410312 / 2950
2006 Coliform (TCR) MR 16 SDWIS / AZ0410312 / 3100
2006 Coliform (TCR) MCL 2 SDWIS / AZ0410312 / 3100
2004 Nitrate MR 5 SDWIS / AZ0410312 / 1040
2004 Fluoride MR 1 SDWIS / AZ0410312 / 1025
2004 Combined Uranium MR 1 SDWIS / AZ0410312 / 4006
2004 Gross Alpha, Excl. Radon and U MR 1 SDWIS / AZ0410312 / 4000
2002 cis-1,2-Dichloroethylene MR 2 SDWIS / AZ0410312 / 2380
2002 Xylenes, Total MR 2 SDWIS / AZ0410312 / 2955
2002 o-Dichlorobenzene MR 2 SDWIS / AZ0410312 / 2968
2002 p-Dichlorobenzene MR 2 SDWIS / AZ0410312 / 2969
2002 1,1-Dichloroethylene MR 2 SDWIS / AZ0410312 / 2977

How Sahuarita Water Company Compares

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

Metric Sahuarita Water Company Arizona avg Federal benchmark
Total violations 101 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 18,178 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 Sahuarita Water Company water safe to drink? ▼
Sahuarita Water Company (PWS ID: AZ0410312) has 101 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 18,178 people using Groundwater sources.
How many people does Sahuarita Water Company serve? ▼
Sahuarita Water Company serves 18,178 people in Sahuarita, Arizona. It is a Public/Private-owned system using Groundwater water sources with 7,002 service connections.
What type of violations does Sahuarita Water Company have? ▼
Sahuarita Water Company has 101 total violations: 2 health-based violations (MCL exceedances or treatment failures), 92 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sahuarita Water Company water? ▼
No. Sahuarita Water Company was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Sahuarita Water Company use? ▼
Sahuarita 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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.