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RANCHO TIERRA BLANCA POA

PWS ID: AZ0410272 · MARANA, Arizona 85653

RANCHO TIERRA BLANCA POA serves 126 people in MARANA, Arizona using Groundwater water sources. It has 204 recorded EPA violations, including 1 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: RANCHO TIERRA BLANCA POA

RANCHO TIERRA BLANCA POA is a private-owned community water system that delivers drinking water to 126 residents in MARANA, Arizona (Pima County) through 45 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 1 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 159 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 49 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. RANCHO TIERRA BLANCA POA's 204 violations sit above 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
126
Total Violations
204
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
45
County
Pima
School/Daycare
No
MCL Violations
1
Monitoring Violations
159
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 49 2013
Consumer Confidence Rule Other 34 2021
Revised Total Coliform Rule MON 27 2018
Lead and Copper Rule MR 5 2016
Nitrate MR 4 2002
E. COLI MR 2 2013
cis-1,2-Dichloroethylene MR 2 2002
DICHLOROMETHANE MR 2 2002
p-Dichlorobenzene MR 2 2002
1,2-Dichloroethane MR 2 2002
1,1,1-Trichloroethane MR 2 2002
Carbon tetrachloride MR 2 2002
1,2-Dichloropropane MR 2 2002
Trichloroethylene MR 2 2002
1,1,2-Trichloroethane MR 2 2002
CHLOROBENZENE MR 2 2002
Benzene MR 2 2002
Toluene MR 2 2002
Ethylbenzene MR 2 2002
1,2,4-Trichlorobenzene MR 2 2002
Xylenes, Total MR 2 2002
Tetrachloroethylene MR 2 2002
Styrene MR 2 2002
1,1-Dichloroethylene MR 2 2002
Gross Alpha, Excl. Radon and U MR 2 1989
o-Dichlorobenzene MR 2 2002
trans-1,2-Dichloroethylene MR 2 2002
BHC-GAMMA MR 1 1998
Dalapon MR 1 1998
Diquat MR 1 1998

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 RANCHO TIERRA BLANCA POA.

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 AZ0410272 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 RANCHO TIERRA BLANCA POA 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
2021 Consumer Confidence Rule Other 34 SDWIS / AZ0410272 / 7000
2018 Revised Total Coliform Rule MON 27 SDWIS / AZ0410272 / 8000
2016 Lead and Copper Rule MR 5 SDWIS / AZ0410272 / 5000
2013 Coliform (TCR) MR 49 SDWIS / AZ0410272 / 3100
2013 E. COLI MR 2 SDWIS / AZ0410272 / 3014
2002 Nitrate MR 4 SDWIS / AZ0410272 / 1040
2002 cis-1,2-Dichloroethylene MR 2 SDWIS / AZ0410272 / 2380
2002 DICHLOROMETHANE MR 2 SDWIS / AZ0410272 / 2964
2002 p-Dichlorobenzene MR 2 SDWIS / AZ0410272 / 2969
2002 1,2-Dichloroethane MR 2 SDWIS / AZ0410272 / 2980
2002 1,1,1-Trichloroethane MR 2 SDWIS / AZ0410272 / 2981
2002 Carbon tetrachloride MR 2 SDWIS / AZ0410272 / 2982
2002 1,2-Dichloropropane MR 2 SDWIS / AZ0410272 / 2983
2002 Trichloroethylene MR 2 SDWIS / AZ0410272 / 2984
2002 1,1,2-Trichloroethane MR 2 SDWIS / AZ0410272 / 2985

How RANCHO TIERRA BLANCA POA Compares

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

Metric RANCHO TIERRA BLANCA POA Arizona avg Federal benchmark
Total violations 204 153.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 1 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 126 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 RANCHO TIERRA BLANCA POA water safe to drink? ▼
RANCHO TIERRA BLANCA POA (PWS ID: AZ0410272) has 204 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 126 people using Groundwater sources.
How many people does RANCHO TIERRA BLANCA POA serve? ▼
RANCHO TIERRA BLANCA POA serves 126 people in MARANA, Arizona. It is a Private-owned system using Groundwater water sources with 45 service connections.
What type of violations does RANCHO TIERRA BLANCA POA have? ▼
RANCHO TIERRA BLANCA POA has 204 total violations: 1 health-based violations (MCL exceedances or treatment failures), 159 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in RANCHO TIERRA BLANCA POA water? ▼
No PFAS testing data is available for RANCHO TIERRA BLANCA POA under the EPA's UCMR5 monitoring program.
What water source does RANCHO TIERRA BLANCA POA use? ▼
RANCHO TIERRA BLANCA POA 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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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial