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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090600151

Soboba

San Jacinto, EPA Region 9 — Tribal Water Systems 92581 - drinking water served from groundwater sources to 3,000 people, tracked in EPA SDWIS and UCMR5.

3,000
People served
144
EPA violations
8
Health-based
Untested
UCMR5 result

The verdict

EPA records 144 drinking-water violations at Soboba, 6% of them health-based.

144
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
3,000
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Soboba

Soboba is a native american-owned community water system that delivers drinking water to 3,000 residents in San Jacinto, EPA Region 9 — Tribal Water Systems through 250 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 144 total violations for this system , of which 8 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 71 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 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 9 — 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
3,000
Total Violations
144
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
250
School/Daycare
No
MCL Violations
8
Monitoring Violations
71
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 10 2011
Coliform (TCR) MCL 8 2003
DICHLOROMETHANE MR 3 2019
Nitrate MR 2 2002
2,4,5-TP MR 2 1998
Pentachlorophenol MR 2 1998
1,2-DIBROMO-3-CHLOROPROPANE MR 2 1998
Total Haloacetic Acids (HAA5) MR 2 2019
TTHM MR 2 2019
Consumer Confidence Rule Other 2 2010
ETHYLENE DIBROMIDE MR 2 1998
Carbofuran MR 2 1998
OXAMYL MR 1 1998
Dalapon MR 1 1998
Dinoseb MR 1 1998
Atrazine MR 1 1998
2,3,7,8-TCDD MR 1 1998
Benzo(a)pyrene MR 1 1998
1,2,4-Trichlorobenzene MR 1 1998
cis-1,2-Dichloroethylene MR 1 1998
Total Polychlorinated Biphenyls (PCB) MR 1 1998
Vinyl chloride MR 1 1998
p-Dichlorobenzene MR 1 1998
1,1-Dichloroethylene MR 1 1998
Carbon tetrachloride MR 1 1998
1,1,1-Trichloroethane MR 1 1998
1,2-Dichloropropane MR 1 1998
1,1,2-Trichloroethane MR 1 1998
Tetrachloroethylene MR 1 1998
Benzene 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 Soboba.

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 090600151 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 9 — Tribal Water Systems Drinking Water Authority

EPA Region 9 — 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 09 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
2023 Chlorine MR 1 SDWIS / 090600151 / 0999
2023 Revised Total Coliform Rule RPT 1 SDWIS / 090600151 / 8000
2023 Revised Total Coliform Rule MON 1 SDWIS / 090600151 / 8000
2021 Gross Alpha, Excl. Radon and U MR 1 SDWIS / 090600151 / 4000
2021 Combined Uranium MR 1 SDWIS / 090600151 / 4006
2020 Combined Radium (-226 and -228) MR 1 SDWIS / 090600151 / 4010
2019 DICHLOROMETHANE MR 3 SDWIS / 090600151 / 2964
2019 Total Haloacetic Acids (HAA5) MR 2 SDWIS / 090600151 / 2456
2019 TTHM MR 2 SDWIS / 090600151 / 2950
2017 E. COLI MR 1 SDWIS / 090600151 / 3014
2011 Coliform (TCR) MR 10 SDWIS / 090600151 / 3100
2010 Consumer Confidence Rule Other 2 SDWIS / 090600151 / 7000
2003 Coliform (TCR) MCL 8 SDWIS / 090600151 / 3100
2002 Nitrate MR 2 SDWIS / 090600151 / 1040
1998 2,4,5-TP MR 2 SDWIS / 090600151 / 2110

How Soboba Compares

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

Metric Soboba EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 144 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 8 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 3,000 - 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 9 — 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 Soboba water safe to drink? ▼
Soboba (PWS ID: 090600151) has 144 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 3,000 people using Groundwater sources.
How many people does Soboba serve? ▼
Soboba serves 3,000 people in San Jacinto, EPA Region 9 — Tribal Water Systems. It is a Native American-owned system using Groundwater water sources with 250 service connections.
What type of violations does Soboba have? ▼
Soboba has 144 total violations: 8 health-based violations (MCL exceedances or treatment failures), 71 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Soboba water? ▼
No PFAS testing data is available for Soboba under the EPA's UCMR5 monitoring program.
What water source does Soboba use? ▼
Soboba 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.