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Review government records associated with San Luis, Arizona.
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Preparing San Luis environmental records...
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 San Luis, AZ from EPA SDWIS.
San Luis City of
Active health-based drinking-water issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 39,705 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.
Yuma 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
No EPA nonattainment designation records shown for this report.
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
San Luis Rio Colorado Well 10
Annual mean: 0.044 Parts per million
EPA primary exceedance count: 1 (Ozone 8-hour 2015)
Observation year: 2025
Yuma Supersite
Annual mean: 0.046 Parts per million
EPA primary exceedance count: 1 (Ozone 8-hour 2015)
Observation year: 2025
Annual mean: 46.7 Micrograms/cubic meter (25 C)
EPA primary exceedance count: 6 (PM10 24-hour 2006)
Observation year: 2025
Data from EPA AQS
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Formerly 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 FUDSNo MSHA mine or extraction site records shown for this report.
Yuma County, AZ
EPA Radon Zone Map (June 2024 release)
Yuma 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.
Minimal flood hazard — outside the 1% and 0.2% annual chance floodplains.
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.
Yuma County, ArizonaPop. 207,842
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 | 9,428 | 8,865 | 7,972 |
| Poor or Fair Health | 22.4% | 15.7% | 14.2% |
| Poor Physical Health Days | 4.2 | 3.5 | 3.3 |
| Poor Mental Health Days | 4.9 | 4.9 | 4.8 |
| Adult Smoking | 15.7% | 13.5% | 15.0% |
| Adult Obesity | 40.8% | 31.8% | 34.0% |
| Air Pollution - Particulate Matter | 7.9 | 4.8 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 13.0% | 9.7% | 9.6% |
| Life Expectancy | 78.6 | 77.5 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in San Luis.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 32 violations for the City of San Luis.
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 San Luis.
The monitoring station at San Luis Rio Colorado Well 10 recorded an annual average of 0.044 Parts per million for ozone in 2025.
The monitoring station at Yuma Supersite recorded an annual average of 0.046 Parts per million for ozone in 2025.
The monitoring station at Yuma Supersite recorded an annual average of 46.7 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The radon data for San Luis covers Yuma 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 or brownfield sites were returned for this city report.
The county data for San Luis reports a life expectancy of 78.6 years in Yuma County, Arizona.
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 San Luis reports 9,428 years of life lost to deaths before age 75 per 100,000 residents in Yuma County, Arizona. 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 San Luis lists fine-particle pollution (PM2.5) at 7.9 micrograms per cubic meter in Yuma County, Arizona.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.