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Non-Transient Non-Community Water System · PWS CA3301373

Oasis Date Gardens

Thermal, California 92274 - drinking water served from groundwater sources to 832 people, tracked in EPA SDWIS and UCMR5.

832
People served
67
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 67 drinking-water violations at Oasis Date Gardens, 3% of them health-based - above the California per-system average.

67
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
832
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Oasis Date Gardens

Oasis Date Gardens is a private-owned non-transient non-community water system that delivers drinking water to 832 residents in Thermal, California (Riverside County) through 4 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 67 total violations for this system , of which 2 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 53 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 Coliform (TCR), recorded in 7 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 California, EPA tracks 7,249 public water systems serving 42,404,883 people, with 153,308 cumulative violations and 63,983 health-based violations on record. About 89% of systems in the state carry at least one violation, and state-wide the average per system is 21.1 violations. Statewide, 447 of 694 UCMR5-tested systems have reported PFAS detections (64.4%).

Oasis Date Gardens's 67 violations sit above the California 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
832
Total Violations
67
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
4
County
Riverside
School/Daycare
No
MCL Violations
1
Monitoring Violations
53
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 7 2015
Nitrate MR 4 2023
Consumer Confidence Rule Other 4 2014
o-Dichlorobenzene MR 2 2011
Vinyl chloride MR 2 2011
1,1-Dichloroethylene MR 2 2011
trans-1,2-Dichloroethylene MR 2 2011
1,2-Dichloroethane MR 2 2011
1,1,1-Trichloroethane MR 2 2011
Carbon tetrachloride MR 2 2011
Trichloroethylene MR 2 2011
1,1,2-Trichloroethane MR 2 2011
Tetrachloroethylene MR 2 2011
CHLOROBENZENE MR 2 2011
Benzene MR 2 2011
Ethylbenzene MR 2 2011
Styrene MR 2 2011
1,2,4-Trichlorobenzene MR 2 2011
DICHLOROMETHANE MR 2 2011
cis-1,2-Dichloroethylene MR 2 2011
Xylenes, Total MR 2 2011
p-Dichlorobenzene MR 2 2011
Toluene MR 2 2011
1,2-Dichloropropane MR 2 2011
LEAD AND COPPER RULE REVISIONS RPT 1 2024
Coliform (TCR) MCL 1 2000
LEAD AND COPPER RULE REVISIONS TT 1 2024

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 Oasis Date Gardens.

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 CA3301373 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

California Drinking Water Authority

California State Water Resources Control Board, Division of Drinking Water is the primacy agency that licenses and inspects Oasis Date Gardens under EPA-delegated authority.

Open CA regulator portal

Source: California State Water Resources Control Board, Division of Drinking Water

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 LEAD AND COPPER RULE REVISIONS RPT 1 SDWIS / CA3301373 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 1 SDWIS / CA3301373 / 5200
2023 Nitrate MR 4 SDWIS / CA3301373 / 1040
2015 Coliform (TCR) MR 7 SDWIS / CA3301373 / 3100
2014 Consumer Confidence Rule Other 4 SDWIS / CA3301373 / 7000
2011 o-Dichlorobenzene MR 2 SDWIS / CA3301373 / 2968
2011 Vinyl chloride MR 2 SDWIS / CA3301373 / 2976
2011 1,1-Dichloroethylene MR 2 SDWIS / CA3301373 / 2977
2011 trans-1,2-Dichloroethylene MR 2 SDWIS / CA3301373 / 2979
2011 1,2-Dichloroethane MR 2 SDWIS / CA3301373 / 2980
2011 1,1,1-Trichloroethane MR 2 SDWIS / CA3301373 / 2981
2011 Carbon tetrachloride MR 2 SDWIS / CA3301373 / 2982
2011 Trichloroethylene MR 2 SDWIS / CA3301373 / 2984
2011 1,1,2-Trichloroethane MR 2 SDWIS / CA3301373 / 2985
2011 Tetrachloroethylene MR 2 SDWIS / CA3301373 / 2987

How Oasis Date Gardens Compares

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

Metric Oasis Date Gardens California avg Federal benchmark
Total violations 67 21.1 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 8.8 Indicates a contaminant exceeded a federal MCL
PFAS detection None 64.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 832 5,850 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,249 regulated public water systems in California.

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 Oasis Date Gardens water safe to drink? ▼
Oasis Date Gardens (PWS ID: CA3301373) has 67 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 832 people using Groundwater sources.
How many people does Oasis Date Gardens serve? ▼
Oasis Date Gardens serves 832 people in Thermal, California. It is a Private-owned system using Groundwater water sources with 4 service connections.
What type of violations does Oasis Date Gardens have? ▼
Oasis Date Gardens has 67 total violations: 2 health-based violations (MCL exceedances or treatment failures), 53 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Oasis Date Gardens water? ▼
No PFAS testing data is available for Oasis Date Gardens under the EPA's UCMR5 monitoring program.
What water source does Oasis Date Gardens use? ▼
Oasis Date Gardens 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.