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Transient Non-Community Water System · PWS AZ0412701

Tumacacori National Historic Park

Tumacacori, Arizona 85640 - drinking water served from groundwater sources to 170 people, tracked in EPA SDWIS and UCMR5.

170
People served
23
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 23 drinking-water violations at Tumacacori National Historic Park - below the Arizona per-system average.

23
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
170
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tumacacori National Historic Park

Tumacacori National Historic Park is a federal-owned transient non-community water system that delivers drinking water to 170 residents in Tumacacori, Arizona (Santa Cruz County) through 6 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 23 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 7 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 12 violations (RPT). 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%).

Tumacacori National Historic Park's 23 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
170
Total Violations
23
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Federal
Connections
6
County
Santa Cruz
School/Daycare
No
MCL Violations
0
Monitoring Violations
7
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule RPT 12 2024
Revised Total Coliform Rule MON 3 2024
Nitrite MR 2 2002
Coliform (TCR) MR 2 2013
Public Notice Other 1 2025

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 Tumacacori National Historic Park.

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 AZ0412701 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 Tumacacori National Historic Park 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
2025 Public Notice Other 1 SDWIS / AZ0412701 / 7500
2024 Revised Total Coliform Rule RPT 12 SDWIS / AZ0412701 / 8000
2024 Revised Total Coliform Rule MON 3 SDWIS / AZ0412701 / 8000
2013 Coliform (TCR) MR 2 SDWIS / AZ0412701 / 3100
2002 Nitrite MR 2 SDWIS / AZ0412701 / 1041

How Tumacacori National Historic Park Compares

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

Metric Tumacacori National Historic Park Arizona avg Federal benchmark
Total violations 23 153.3 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 170 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 Tumacacori National Historic Park water safe to drink? ▼
Tumacacori National Historic Park (PWS ID: AZ0412701) has 23 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 170 people using Groundwater sources.
How many people does Tumacacori National Historic Park serve? ▼
Tumacacori National Historic Park serves 170 people in Tumacacori, Arizona. It is a Federal-owned system using Groundwater water sources with 6 service connections.
What type of violations does Tumacacori National Historic Park have? ▼
Tumacacori National Historic Park has 23 total violations: 0 health-based violations (MCL exceedances or treatment failures), 7 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tumacacori National Historic Park water? ▼
No PFAS testing data is available for Tumacacori National Historic Park under the EPA's UCMR5 monitoring program.
What water source does Tumacacori National Historic Park use? ▼
Tumacacori National Historic Park uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.