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Review government records associated with Johnstown, Colorado.
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Preparing Johnstown 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 Johnstown, CO from EPA SDWIS.
Johnstown Town of
Active monitoring or reporting issue detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 27,295 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
NPDES permits regulate pollutant discharges into U.S. waterways. Facilities must report compliance quarterly.
No NPDES-permitted facility records with current violation flags surfaced for this city report.
Reviewed: active/open records as of Q4 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.
Weld County
Assessment year: 2020
According to EPA, a cancer risk of 50-in-1-million means that for every 1 million people continuously exposed to these air toxics over a 70-year lifetime, an estimated 50 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.
Denver Metro/North Front Range: Ozone
NonattainmentSerious8-Hour Ozone (2015 Standard)
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
Denver-Boulder-Greeley-Ft. Collins-Loveland: Ozone
NonattainmentSevere 158-Hour Ozone (2008 Standard)
Original designation: Jul 2012
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
Greeley Area
CO · Carbon Monoxide (1971 Standard)
Classification: Not Classified
Original designation: Nov 1990
Current design value: 1.2 ppm (2023-2025)
Data from EPA Green Book
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Bethke — Timnath, Colorado
Annual mean: 13.1 Parts per billion
Observation year: 2025
Annual mean: 0.046 Parts per million
EPA primary exceedance count: 11 (Ozone 8-hour 2015)
Observation year: 2025
Annual mean: 5.5 Micrograms/cubic meter (LC)
Observation year: 2025
Data from EPA AQS
Facilities regulated under the Clean Air Act. CAA HPV flags indicate serious noncompliance such as exceeding emission limits.
Air Violations
Last inspected: Dec 2025
Last inspected: Dec 2025
Data from EPA ECHO
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 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
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
FracFocus Chemical Disclosure Registry — national registry of chemicals used in hydraulic fracturing operations, as reported by operators to the Ground Water Protection Council and Interstate Oil and Gas Compact Commission.
FracFocus well disclosures (3)
Data from FracFocus
Weld County, CO
EPA Radon Zone Map (June 2024 release)
Weld County is EPA Radon Zone 1 (highest potential). EPA defines Zone 1 counties as having predicted average indoor screening levels above 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.
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.
PHMSA tracks incidents involving natural gas and hazardous liquid pipelines. Incidents include leaks, ruptures, and explosions.
Recent Incidents (last 5 years)
PUBLIC SERVICE CO OF COLORADO
Incident date: Jul 24, 2025
Property damage: $130,000
Data from PHMSA
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Weld County, ColoradoPop. 350,176
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 | 6,640 | 6,994 | 7,972 |
| Poor or Fair Health | 14.5% | 12.8% | 14.2% |
| Poor Physical Health Days | 3.6 | 3.1 | 3.3 |
| Poor Mental Health Days | 4.7 | 4.8 | 4.8 |
| Adult Smoking | 14.4% | 12.1% | 15.0% |
| Adult Obesity | 28.7% | 25.1% | 34.0% |
| Air Pollution - Particulate Matter | 9.0 | 4.5 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 7.8% | 6.5% | 9.6% |
| Life Expectancy | 79.3 | 79.0 | 77.6 |
This report does not have PFAS sample results for the candidate water systems in Johnstown.
Check with the utility that serves your address for its testing results.
EPA drinking water records on this page list 43 violations for the Town of Johnstown.
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 Johnstown.
The monitoring station at Bethke, Timnath, Colorado recorded an annual average of 13.1 Parts per billion for nitrogen dioxide in 2025.
The monitoring station at Bethke, Timnath, Colorado recorded an annual average of 0.046 Parts per million for ozone in 2025.
The monitoring station at Bethke, Timnath, Colorado recorded an annual average of 5.5 Micrograms/cubic meter (LC) for fine particles (PM2.5) in 2025.
The radon data for Johnstown covers Weld County. EPA places this area in Zone 1, with a predicted average indoor radon screening level above 4 picocuries per liter.
No Superfund or brownfield sites were returned for this city report.
The county data for Johnstown reports a life expectancy of 79.3 years in Weld County, Colorado.
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 Johnstown reports 6,640 years of life lost to deaths before age 75 per 100,000 residents in Weld County, Colorado. 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 Johnstown lists fine-particle pollution (PM2.5) at 9.0 micrograms per cubic meter in Weld County, Colorado.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
Federal pipeline records list an incident involving Public Service Co of Colorado near Johnstown on Jul 24, 2025. The reported release was natural gas.