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Review government records associated with Nogales, Arizona.
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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 Nogales, AZ from EPA SDWIS.
Nogales 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 22,000 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 PFASEPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Nogales Wash
Reported: Nov 2026
Health-relevant causes: Metals (other Than Mercury), Pathogens
Affected uses: Ecological, Recreation
Data from EPA ATTAINS
Reviewed: source records as of Q4 2025
To investigate water contamination, check the sampling locations, dates and results below. For tap water records, see Drinking water quality above.
Recent samples at 3 of 3 monitoring stations were above a drinking-water reference value used for screening. These monitoring results do not establish a public water system violation.
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
Santa Cruz County
Assessment year: 2020
According to EPA, a cancer risk of 20-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 20 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.
Santa Cruz County; Nogales planning area: PM10
NonattainmentModeratePM-10 (1987 Standard)
Original designation: Nov 1990
Health effects (EPA): Respiratory illness, aggravation of asthma (EPA)
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Nogales
PM2.5 · PM-2.5 (2006 Standard)
Classification: Moderate
Original designation: Dec 2009
Current design value: 29 µg/m³ (2023-2025)
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Nogales Post Office
Annual mean: 48.5 Micrograms/cubic meter (25 C)
EPA primary exceedance count: 2 (PM10 24-hour 2006)
Observation year: 2025
Annual mean: 11.0 Micrograms/cubic meter (LC)
Observation year: 2025
Nogales Sonora Institute Itn
Annual mean: 0.038 Parts per million
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reviewed: source records as of 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 ECHO2 sites with active cleanup or investigation status
2150 N Congress Drive, Nogales
Reported: Feb 2026
40 E Jefferson St, Nogales
Reported: Feb 2026
Facilities with hazardous-waste handler records under RCRA in the reviewed 5-mile city-center search area. Active handler status is separate from air, water, or other ECHO compliance violations, which are shown in their own sections.
Active RCRA handler records in the reviewed city search area
Release reports
Reported: Dec 2021
Reported: Dec 2021
Data from EPA UST Finder
Reviewed: reporting year 2024
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.
Santa Cruz County, AZ
EPA Radon Zone Map (June 2024 release)
Santa Cruz 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.
Santa Cruz County, ArizonaPop. 48,759
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 | 7,080 | 8,865 | 7,972 |
| Poor or Fair Health | 23.4% | 15.7% | 14.2% |
| Poor Physical Health Days | 4.4 | 3.5 | 3.3 |
| Poor Mental Health Days | 5.3 | 4.9 | 4.8 |
| Adult Smoking | 14.8% | 13.5% | 15.0% |
| Adult Obesity | 35.5% | 31.8% | 34.0% |
| Air Pollution - Particulate Matter | 8.8 | 4.8 | 7.3 |
| Drinking water violation indicator | No | N/A | N/A |
| Diabetes Prevalence | 12.8% | 9.7% | 9.6% |
| Life Expectancy | 79.6 | 77.5 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Nogales.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 637 violations for the City of Nogales, including 2 marked active.
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 Nogales.
The monitoring station at Nogales Post Office recorded an annual average of 48.5 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Nogales Post Office recorded an annual average of 11 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Nogales Sonora Institute Itn recorded an annual average of 0.038 Parts per million for ozone in 2025.
The radon data for Nogales covers Santa Cruz 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 3 brownfield sites: 2150 N Congress Drive Property; 40 E Jefferson Street Property; 48 N Morley Nogales Az.
EPA Superfund recordsView on EPA ECHOView on EPA ECHOView on EPA ECHO
The county data for Nogales reports a life expectancy of 79.6 years in Santa Cruz 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 Nogales reports 7,080 years of life lost to deaths before age 75 per 100,000 residents in Santa Cruz 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 Nogales lists fine-particle pollution (PM2.5) at 8.8 micrograms per cubic meter in Santa Cruz County, Arizona.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.