Community Water System · PWS CA3610049
Twentynine Palms Water District
Twentynine Palms, California 92277 - drinking water served from groundwater sources to 18,795 people, tracked in EPA SDWIS and UCMR5.
- 18,795
- People served
- 254
- EPA violations
- 251
- Health-based
- No PFAS
- UCMR5 result
The verdict
EPA records 254 drinking-water violations at Twentynine Palms Water District, 99% of them health-based - above the California per-system average.
- 254
- Total EPA violations on record
- 99%
- Health-based (MCL / treatment failure)
- 18,795
- People served by this system
- 0
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Twentynine Palms Water District
Twentynine Palms Water District is a local-owned community water system that delivers drinking water to 18,795 residents in Twentynine Palms, California (San Bernardino County) through 7,400 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 254 total violations for this system , of which 251 (99%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. The most recent violation on record dates to 1993.
The most frequently cited contaminant at this system is Fluoride, recorded in 248 violations (MCL, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.
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%).
Twentynine Palms Water District's 254 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.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 7,400
- County
- San Bernardino
- School/Daycare
- No
- MCL Violations
- 251
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Fluoride | MCL | 248 | 1988 |
| Coliform (TCR) | MCL | 2 | 1993 |
| Nitrate | MCL | 1 | 1982 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 406 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHxA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 4/14/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFMBA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHpS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFPeS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDoA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 4/14/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 4/14/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 4/14/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFEESA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFBS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/14/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFNA | 4/14/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpS | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 4/14/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 4/14/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 4/14/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
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 Twentynine Palms Water District.
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 CA3610049 on SDWISSource: EPA SDWIS Federal Reports Search
California Drinking Water Authority
California State Water Resources Control Board, Division of Drinking Water is the primacy agency that licenses and inspects Twentynine Palms Water District under EPA-delegated authority.
Open CA regulator portalSource: 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 |
|---|---|---|---|---|
| 1993 | Coliform (TCR) | MCL | 2 | SDWIS / CA3610049 / 3100 |
| 1988 | Fluoride | MCL | 248 | SDWIS / CA3610049 / 1025 |
| 1982 | Nitrate | MCL | 1 | SDWIS / CA3610049 / 1040 |
How Twentynine Palms Water District Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Twentynine Palms Water District | California avg | Federal benchmark |
|---|---|---|---|
| Total violations | 254 | 21.1 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 251 | 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 | 18,795 | 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 Twentynine Palms Water District water safe to drink? ▼
How many people does Twentynine Palms Water District serve? ▼
What type of violations does Twentynine Palms Water District have? ▼
Has PFAS been detected in Twentynine Palms Water District water? ▼
What water source does Twentynine Palms Water District use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
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.