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States → EPA Region 9 — Tribal Water Systems

Community Water System · PWS 090605160

DD Mobile Home Park

Thermal, EPA Region 9 — Tribal Water Systems 92274 - drinking water served from groundwater sources to 300 people, tracked in EPA SDWIS and UCMR5.

300
People served
274
EPA violations
74
Health-based
Untested
UCMR5 result

The verdict

EPA records 274 drinking-water violations at DD Mobile Home Park, 27% of them health-based.

274
Total EPA violations on record
27%
Health-based (MCL / treatment failure)
300
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: DD Mobile Home Park

DD Mobile Home Park is a private-owned community water system that delivers drinking water to 300 residents in Thermal, EPA Region 9 — Tribal Water Systems through 76 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 274 total violations for this system , of which 74 (27%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 80 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 Arsenic, recorded in 65 violations (MCL, health-based). 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
300
Total Violations
274
Health-Based Violations
74
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
76
School/Daycare
No
MCL Violations
66
Monitoring Violations
80
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 65 2024
Revised Total Coliform Rule MON 16 2025
Revised Total Coliform Rule RPT 16 2025
Public Notice Other 16 2025
Coliform (TCR) MR 15 2015
Fluoride MR 13 2025
Chlorine MR 12 2025
Arsenic MR 10 2024
Groundwater Rule TT 7 2024
Nitrate MR 5 2024
Consumer Confidence Rule Other 5 2024
E. COLI MR 3 2022
1,2-Dichloroethane MR 1 2004
Stage 1 Disinfectants and Disinfection Byproducts Rule TT 1 2019
Total Haloacetic Acids (HAA5) MR 1 2020
Revised Total Coliform Rule Other 1 2016
Lead and Copper Rule MR 1 2022
Combined Radium (-226 and -228) MR 1 2009
Fluoride MCL 1 2016
TTHM MR 1 2020
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 1 2013

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 DD Mobile Home 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 090605160 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
2025 Revised Total Coliform Rule MON 16 SDWIS / 090605160 / 8000
2025 Revised Total Coliform Rule RPT 16 SDWIS / 090605160 / 8000
2025 Public Notice Other 16 SDWIS / 090605160 / 7500
2025 Fluoride MR 13 SDWIS / 090605160 / 1025
2025 Chlorine MR 12 SDWIS / 090605160 / 0999
2024 Arsenic MCL 65 SDWIS / 090605160 / 1005
2024 Arsenic MR 10 SDWIS / 090605160 / 1005
2024 Groundwater Rule TT 7 SDWIS / 090605160 / 0700
2024 Nitrate MR 5 SDWIS / 090605160 / 1040
2024 Consumer Confidence Rule Other 5 SDWIS / 090605160 / 7000
2022 E. COLI MR 3 SDWIS / 090605160 / 3014
2022 Lead and Copper Rule MR 1 SDWIS / 090605160 / 5000
2020 Total Haloacetic Acids (HAA5) MR 1 SDWIS / 090605160 / 2456
2020 TTHM MR 1 SDWIS / 090605160 / 2950
2019 Stage 1 Disinfectants and Disinfection Byproducts Rule TT 1 SDWIS / 090605160 / 0400

How DD Mobile Home Park Compares

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

Metric DD Mobile Home Park EPA Region 9 — Tribal Water Systems avg Federal benchmark
Total violations 274 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 74 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 300 - 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 DD Mobile Home Park water safe to drink? ▼
DD Mobile Home Park (PWS ID: 090605160) has 274 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 300 people using Groundwater sources.
How many people does DD Mobile Home Park serve? ▼
DD Mobile Home Park serves 300 people in Thermal, EPA Region 9 — Tribal Water Systems. It is a Private-owned system using Groundwater water sources with 76 service connections.
What type of violations does DD Mobile Home Park have? ▼
DD Mobile Home Park has 274 total violations: 74 health-based violations (MCL exceedances or treatment failures), 80 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in DD Mobile Home Park water? ▼
No PFAS testing data is available for DD Mobile Home Park under the EPA's UCMR5 monitoring program.
What water source does DD Mobile Home Park use? ▼
DD Mobile Home Park 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.