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LA CASITA WATER COMPANY 3

PWS ID: AZ0420606 · TUCSON, Arizona 85754

LA CASITA WATER COMPANY 3 serves 605 people in TUCSON, Arizona using Groundwater water sources. It has 129 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: LA CASITA WATER COMPANY 3

LA CASITA WATER COMPANY 3 is a private-owned community water system that delivers drinking water to 605 residents in TUCSON, Arizona (Pima County) through 248 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 129 total violations for this system , of which 4 (3%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 114 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 Chlorine, recorded in 19 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. LA CASITA WATER COMPANY 3's 129 violations sit below 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
605
Total Violations
129
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
248
County
Pima
School/Daycare
No
MCL Violations
4
Monitoring Violations
114
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 19 2010
Nitrate MR 18 2009
Coliform (TCR) MR 16 2009
TTHM MR 4 2023
Total Haloacetic Acids (HAA5) MR 4 2023
Coliform (TCR) MCL 4 2010
Consumer Confidence Rule Other 4 2009
Lead and Copper Rule MR 3 2005
Xylenes, Total MR 2 2001
p-Dichlorobenzene MR 2 2001
trans-1,2-Dichloroethylene MR 2 2001
1,2-Dichloroethane MR 2 2001
1,1,1-Trichloroethane MR 2 2001
1,2-Dichloropropane MR 2 2001
1,1,2-Trichloroethane MR 2 2001
Tetrachloroethylene MR 2 2001
Benzene MR 2 2001
Toluene MR 2 2001
Styrene MR 2 2001
cis-1,2-Dichloroethylene MR 2 2001
o-Dichlorobenzene MR 2 2001
Carbon tetrachloride MR 2 2001
CHLOROBENZENE MR 2 2001
Ethylbenzene MR 2 2001
Revised Total Coliform Rule RPT 2 2019
DICHLOROMETHANE MR 2 2001
ETHYLENE DIBROMIDE MR 2 2002
1,2,4-Trichlorobenzene MR 2 2001
1,1-Dichloroethylene MR 2 2001
Trichloroethylene MR 2 2001

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 LA CASITA WATER COMPANY 3.

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 AZ0420606 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 LA CASITA WATER COMPANY 3 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 TTHM MR 4 SDWIS / AZ0420606 / 2950
2023 Total Haloacetic Acids (HAA5) MR 4 SDWIS / AZ0420606 / 2456
2019 Revised Total Coliform Rule RPT 2 SDWIS / AZ0420606 / 8000
2010 Chlorine MR 19 SDWIS / AZ0420606 / 0999
2010 Coliform (TCR) MCL 4 SDWIS / AZ0420606 / 3100
2009 Nitrate MR 18 SDWIS / AZ0420606 / 1040
2009 Coliform (TCR) MR 16 SDWIS / AZ0420606 / 3100
2009 Consumer Confidence Rule Other 4 SDWIS / AZ0420606 / 7000
2005 Lead and Copper Rule MR 3 SDWIS / AZ0420606 / 5000
2002 ETHYLENE DIBROMIDE MR 2 SDWIS / AZ0420606 / 2946
2001 Xylenes, Total MR 2 SDWIS / AZ0420606 / 2955
2001 p-Dichlorobenzene MR 2 SDWIS / AZ0420606 / 2969
2001 trans-1,2-Dichloroethylene MR 2 SDWIS / AZ0420606 / 2979
2001 1,2-Dichloroethane MR 2 SDWIS / AZ0420606 / 2980
2001 1,1,1-Trichloroethane MR 2 SDWIS / AZ0420606 / 2981

How LA CASITA WATER COMPANY 3 Compares

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

Metric LA CASITA WATER COMPANY 3 Arizona avg Federal benchmark
Total violations 129 153.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 4 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 605 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 LA CASITA WATER COMPANY 3 water safe to drink? ▼
LA CASITA WATER COMPANY 3 (PWS ID: AZ0420606) has 129 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 605 people using Groundwater sources.
How many people does LA CASITA WATER COMPANY 3 serve? ▼
LA CASITA WATER COMPANY 3 serves 605 people in TUCSON, Arizona. It is a Private-owned system using Groundwater water sources with 248 service connections.
What type of violations does LA CASITA WATER COMPANY 3 have? ▼
LA CASITA WATER COMPANY 3 has 129 total violations: 4 health-based violations (MCL exceedances or treatment failures), 114 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in LA CASITA WATER COMPANY 3 water? ▼
No PFAS testing data is available for LA CASITA WATER COMPANY 3 under the EPA's UCMR5 monitoring program.
What water source does LA CASITA WATER COMPANY 3 use? ▼
LA CASITA WATER COMPANY 3 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.

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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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