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Review government records associated with Twentynine Palms, California.
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Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Public water-system records for Twentynine Palms, CA from EPA SDWIS.
Twentynine Palms Water District
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 18,795 people
Data from EPA SDWIS
Reviewed: source records as of Q1 2026
EPA UCMR5 — No PFAS detection records shown for these water systems
Open data source: EPA UCMR5DoD PFAS — No investigation records shown for this report
Open data source: DoD PFASNo health-relevant impairment records shown among the assessment records in this report.
Reviewed: source records as of 2026
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Reviewed: source records as of 2026
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
San Bernardino County
Assessment year: 2020
According to EPA, a cancer risk of 30-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 30 may develop cancer from that exposure. This is in addition to cancer risk from all other causes.
Top modeled source groups
Data from EPA AirToxScreen
EPA designations apply to a specific pollutant and federal air quality standard (NAAQS). EPA can issue a clean-data determination while a formal designation remains in effect.
Los Angeles-San Bernardino Counties (West Mojave Desert): Ozone
NonattainmentSevere 158-Hour Ozone (2015 Standard)
Original designation: Aug 2018
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
San Bernardino County (part); excluding Searles Valley Planning area and South Coast Air Basin: PM10
NonattainmentModeratePM-10 (1987 Standard)
Original designation: Jan 1994
Health effects (EPA): Respiratory illness, aggravation of asthma (EPA)
Historical designations under the revoked 1997 ozone standard
These records describe historical designations. EPA revoked the 1997 ozone standard on April 6, 2015.
Los Angeles and San Bernardino Counties (Western Mojave Desert)
Historical standard: 0.08 ppm (8-hour)
Historical designation: Nonattainment · Subpart 2/Severe 15
Original designation: Jun 2004
Open data source: EPA final revocation ruleContinuing requirements have not been verified for this area.
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Joshua Tree Np
Annual mean: 0.055 Parts per million
EPA primary exceedance count: 37 (Ozone 8-hour 2015)
Observation year: 2025
Data from EPA AQS
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
U.S. Marine Corps Twentynine Palms Air Ground Combat Center
Reported: 2024
Reviewed: source query run Nov 2026
Brownfield sites are properties where redevelopment is complicated by the presence of hazardous substances.
Open data source: Search EPA ECHONo matching brownfield records with active cleanup or investigation status surfaced for this city report.
Reviewed: active/open records as of Q1 2026
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Toxics Release Inventory data — chemicals disposed on-site at reporting facilities.
U.S. Marine Corps Twentynine Palms Air Ground Combat Center
Open data source: View EPA TRI facility recordFormerly Used Defense Sites are properties previously owned by, leased to, or otherwise possessed by the United States and under the jurisdiction of the Secretary of Defense. The FUDS program addresses environmental restoration at these properties.
Open data source: USACE FUDSSites regulated by the Mine Safety and Health Administration, including mines, sand and gravel operations, and portable crushers. Status and type are from the MSHA Mine Data Retrieval System. Records with active/intermittent status dates older than 5 years are shown as older records rather than current active sites.
No records shown in this group.
Reviewed: status dates within last 5 years
Data from MSHA
San Bernardino County, CA
EPA Radon Zone Map (June 2024 release)
San Bernardino County is EPA Radon Zone 2 (moderate potential). EPA defines Zone 2 counties as having predicted average indoor screening levels between 2 pCi/L and 4 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones describe mapped flood hazards. Look up a specific address with FEMA.
No FEMA flood-zone records shown for this report.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
No EPA ECHO RMP facility records with a usable location matched this city report.
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
San Bernardino County, CaliforniaPop. 2,193,656
County Health Rankings edition: 2024
Premature Death
Poor or Fair Health
Poor Physical Health Days
Poor Mental Health Days
Adult Smoking
Adult Obesity
Air Pollution - Particulate Matter
Drinking water violation indicator
Diabetes Prevalence
Life Expectancy
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 8,917 | 6,373 | 7,972 |
| Poor or Fair Health | 20.9% | 15.8% | 14.2% |
| Poor Physical Health Days | 4.1 | 3.1 | 3.3 |
| Poor Mental Health Days | 5.2 | 4.7 | 4.8 |
| Adult Smoking | 12.5% | 8.8% | 15.0% |
| Adult Obesity | 38.1% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 15.6 | 7.1 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 12.3% | 10.8% | 9.6% |
| Life Expectancy | 76.1 | 79.9 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Twentynine Palms.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 1 violation for Twentynine Palms Water District.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
Nearby EPA monitoring stations provide annual air quality measurements for Twentynine Palms.
The monitoring station at Joshua Tree Np recorded an annual average of 0.055 Parts per million for ozone in 2025.
The radon data for Twentynine Palms covers San Bernardino County. EPA places this area in Zone 2, with a predicted average indoor radon screening level of 2 to 4 picocuries per liter.
No Superfund sites were returned for this city report.
This city report shows 1 brownfield site: Twentynine Palms Reservation Section.
The county data for Twentynine Palms reports a life expectancy of 76.1 years in San Bernardino County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Twentynine Palms reports 8,917 years of life lost to deaths before age 75 per 100,000 residents in San Bernardino County, California. This measure adds up the years lost to early deaths and adjusts for differences in population age.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
The county data for Twentynine Palms lists fine-particle pollution (PM2.5) at 15.6 micrograms per cubic meter in San Bernardino County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.