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Review government records associated with Union Gap, Washington.
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Preparing Union Gap 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 Union Gap, WA from EPA SDWIS.
Union Gap Water
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 6,433 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.
Lower Wide Hollow Creek
Reported: Nov 2026
Health-relevant causes: Pathogens
Affected uses: Ecological, Recreation
Data from EPA ATTAINS
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
Violation records
Last inspected: Dec 2025
Last inspected: Dec 2025
Last inspected: Dec 2025
Data from EPA ECHO
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.
Yakima 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 designates an area as nonattainment when air quality does not meet federal health-based standards (NAAQS) for a specific pollutant.
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Yakima County; (Part)
PM10 · PM-10 (1987 Standard)
Classification: Moderate
Original designation: Nov 1990
Current design value: 0.7 est. exc. (2023-2025)
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Toppenish - Ward Rd (Yakama Tribe)
Annual mean: 7.9 Micrograms/cubic meter (LC)
Observation year: 2025
Yakima - 4Th Ave
Annual mean: 18.4 Micrograms/cubic meter (25 C)
Observation year: 2025
Annual mean: 8.3 Micrograms/cubic meter (LC)
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
EPA records for current, proposed and formerly listed Superfund sites on the National Priorities List (NPL).
Open data source: Search EPA ECHOEPA FRS Registry ID 110005311180
Reported: Nov 2021
EPA FRS Registry ID 110071102608
Reported: Nov 2021
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
State environmental agencies maintain cleanup site databases that include state Superfund, voluntary cleanup, and brownfield remediation programs. These programs track additional sites beyond those on the federal NPL.
No state cleanup site records with active investigation or remediation status surfaced nearby.
Reviewed: active/open records as of WA Ecology TCP (live query)
Data from EPA ECHO
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
Data from EPA UST Finder
Sites 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.
Recently updated active/intermittent sites (1)
Data from MSHA
Yakima County, WA
EPA Radon Zone Map (June 2024 release)
Yakima 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.
Special Flood Hazard Area — 1% annual chance of flooding (100-year floodplain) with base flood elevation.
Results use an earlier stored RMP inventory. Current EPA ECHO location coverage is unverified.
EPA ECHO lists facilities linked to the Risk Management Program. Results include facilities with locations that can be matched. Records may be historical. Current operations, chemical inventories, and recent accident history are unverified.
Reviewed: 2000-present
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Yakima County, WashingtonPop. 257,001
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 | 9,422 | 6,333 | 7,972 |
| Poor or Fair Health | 22.8% | 13.8% | 14.2% |
| Poor Physical Health Days | 4.5 | 3.5 | 3.3 |
| Poor Mental Health Days | 5.2 | 5.2 | 4.8 |
| Adult Smoking | 16.0% | 10.8% | 15.0% |
| Adult Obesity | 39.8% | 28.7% | 34.0% |
| Air Pollution - Particulate Matter | 9.8 | 7.1 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 11.9% | 7.9% | 9.6% |
| Life Expectancy | 75.9 | 79.4 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Union Gap.
Check with the utility that serves your address for its testing results.
The EPA drinking water records available here list no violations for Union Gap Water.
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 Union Gap.
The monitoring station at Toppenish-Ward Rd (Yakama Tribe) recorded an annual average of 7.9 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The monitoring station at Yakima-4Th Ave recorded an annual average of 18.4 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Yakima-4Th Ave recorded an annual average of 8.3 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The radon data for Union Gap covers Yakima County. EPA places this area in Zone 2, with a predicted average indoor radon screening level of 2 to 4 picocuries per liter.
This city report shows 2 Superfund sites: Fmc Yakima; Yakima Plating Co..
This city report shows 1 brownfield site: Roby S Services of Buena.
The county data for Union Gap reports a life expectancy of 75.9 years in Yakima County, Washington.
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 Union Gap reports 9,422 years of life lost to deaths before age 75 per 100,000 residents in Yakima County, Washington. 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 Union Gap lists fine-particle pollution (PM2.5) at 9.8 micrograms per cubic meter in Yakima County, Washington.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.