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Non-Transient Non-Community Water System · PWS AZ0402123

Douglas Border Patrol Station

Tucson, Arizona 85711 - drinking water served from groundwater sources to 450 people, tracked in EPA SDWIS and UCMR5.

450
People served
143
EPA violations
32
Health-based
Untested
UCMR5 result

The verdict

EPA records 143 drinking-water violations at Douglas Border Patrol Station, 22% of them health-based - below the Arizona per-system average.

143
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
450
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Douglas Border Patrol Station

Douglas Border Patrol Station is a federal-owned non-transient non-community water system that delivers drinking water to 450 residents in Tucson, Arizona (Cochise County) through 3 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 143 total violations for this system , of which 32 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 97 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Chlorine, recorded in 38 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%).

Douglas Border Patrol Station's 143 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
450
Total Violations
143
Health-Based Violations
32
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Federal
Connections
3
County
Cochise
School/Daycare
No
MCL Violations
32
Monitoring Violations
97
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 38 2020
Nitrate MCL 32 2019
Coliform (TCR) MR 26 2015
Total Haloacetic Acids (HAA5) MR 8 2024
TTHM MR 8 2024
Revised Total Coliform Rule MON 8 2021
Nitrate MR 5 2024
Lead and Copper Rule MR 4 2019

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 Douglas Border Patrol Station.

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 AZ0402123 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 Douglas Border Patrol Station 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
2024 Total Haloacetic Acids (HAA5) MR 8 SDWIS / AZ0402123 / 2456
2024 TTHM MR 8 SDWIS / AZ0402123 / 2950
2024 Nitrate MR 5 SDWIS / AZ0402123 / 1040
2021 Revised Total Coliform Rule MON 8 SDWIS / AZ0402123 / 8000
2020 Chlorine MR 38 SDWIS / AZ0402123 / 0999
2019 Nitrate MCL 32 SDWIS / AZ0402123 / 1040
2019 Lead and Copper Rule MR 4 SDWIS / AZ0402123 / 5000
2015 Coliform (TCR) MR 26 SDWIS / AZ0402123 / 3100

How Douglas Border Patrol Station Compares

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

Metric Douglas Border Patrol Station Arizona avg Federal benchmark
Total violations 143 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 32 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 450 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 Douglas Border Patrol Station water safe to drink? ▼
Douglas Border Patrol Station (PWS ID: AZ0402123) has 143 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 450 people using Groundwater sources.
How many people does Douglas Border Patrol Station serve? ▼
Douglas Border Patrol Station serves 450 people in Tucson, Arizona. It is a Federal-owned system using Groundwater water sources with 3 service connections.
What type of violations does Douglas Border Patrol Station have? ▼
Douglas Border Patrol Station has 143 total violations: 32 health-based violations (MCL exceedances or treatment failures), 97 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Douglas Border Patrol Station water? ▼
No PFAS testing data is available for Douglas Border Patrol Station under the EPA's UCMR5 monitoring program.
What water source does Douglas Border Patrol Station use? ▼
Douglas Border Patrol Station uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.