PlainWater
States → EPA Region 6 — Tribal Water Systems

Community Water System · PWS 063504118

Santa Ana Eastside

Santa Ana Pueblo, EPA Region 6 — Tribal Water Systems 87004 - drinking water served from groundwater sources to 759 people, tracked in EPA SDWIS and UCMR5.

759
People served
33
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 33 drinking-water violations at Santa Ana Eastside, 15% of them health-based.

33
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
759
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Santa Ana Eastside

Santa Ana Eastside is a native american-owned community water system that delivers drinking water to 759 residents in Santa Ana Pueblo, EPA Region 6 — Tribal Water Systems through 250 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 33 total violations for this system , of which 5 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 22 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 10 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 6 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

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
759
Total Violations
33
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
250
School/Daycare
No
MCL Violations
1
Monitoring Violations
22
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 10 2011
Consumer Confidence Rule Other 6 2005
Groundwater Rule TT 4 2017
Coliform (TCR) MCL 1 1998
Nitrate-Nitrite MR 1 2010
Thallium, Total MR 1 2002
Barium MR 1 2002
CYANIDE MR 1 2002
Cadmium MR 1 2002
Chromium MR 1 2002
Nickel MR 1 2002
Antimony, Total MR 1 2002
TTHM MR 1 2008
Total Haloacetic Acids (HAA5) MR 1 2008
Arsenic MR 1 2010
Selenium MR 1 2002

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 Santa Ana Eastside.

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 063504118 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 6 — Tribal Water Systems Drinking Water Authority

EPA Region 6 — Tribal Water Systems's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 06 regulator via EPA SDWIS

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 Groundwater Rule TT 4 SDWIS / 063504118 / 0700
2011 Coliform (TCR) MR 10 SDWIS / 063504118 / 3100
2010 Nitrate-Nitrite MR 1 SDWIS / 063504118 / 1038
2010 Arsenic MR 1 SDWIS / 063504118 / 1005
2008 TTHM MR 1 SDWIS / 063504118 / 2950
2008 Total Haloacetic Acids (HAA5) MR 1 SDWIS / 063504118 / 2456
2005 Consumer Confidence Rule Other 6 SDWIS / 063504118 / 7000
2002 Thallium, Total MR 1 SDWIS / 063504118 / 1085
2002 Barium MR 1 SDWIS / 063504118 / 1010
2002 CYANIDE MR 1 SDWIS / 063504118 / 1024
2002 Cadmium MR 1 SDWIS / 063504118 / 1015
2002 Chromium MR 1 SDWIS / 063504118 / 1020
2002 Nickel MR 1 SDWIS / 063504118 / 1036
2002 Antimony, Total MR 1 SDWIS / 063504118 / 1074
2002 Selenium MR 1 SDWIS / 063504118 / 1045

How Santa Ana Eastside Compares

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

Metric Santa Ana Eastside EPA Region 6 — Tribal Water Systems avg Federal benchmark
Total violations 33 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 759 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 6 — Tribal Water Systems.

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 Santa Ana Eastside water safe to drink? ▼
Santa Ana Eastside (PWS ID: 063504118) has 33 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 759 people using Groundwater sources.
How many people does Santa Ana Eastside serve? ▼
Santa Ana Eastside serves 759 people in Santa Ana Pueblo, EPA Region 6 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 250 service connections.
What type of violations does Santa Ana Eastside have? ▼
Santa Ana Eastside has 33 total violations: 5 health-based violations (MCL exceedances or treatment failures), 22 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Santa Ana Eastside water? ▼
No PFAS testing data is available for Santa Ana Eastside under the EPA's UCMR5 monitoring program.
What water source does Santa Ana Eastside use? ▼
Santa Ana Eastside 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. 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.