What the Windsor records show
- Water quality and PFAS
- 1 candidate water system shown.Source date: Violations as of Q1 2026
- Air quality and emissions
- 3 monitoring records shown. Observation year: 2025.Source date: AQS data as of 2026
- Land and cleanup records
- No Superfund records returned in this report; No brownfield records returned in this report.
- Infrastructure and incidents
- No pipeline incident records returned in this report; 3 RMP facility records shown (earlier stored inventory, current location coverage unverified).
Water quality in Windsor
Check your water bill for your utility name and confirm the reporting year. See EPA’s guide to finding your annual water quality report.
Drinking Water Compliance
Drinking Water Compliance
Public water-system records for Windsor, CA from EPA SDWIS.
Windsor, Town of
No active drinking-water issues detected in EPA SDWIS.
Reviewed: active/open records as of Q1 2026
City listed in EPA records · Serves 25,561 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 PFASImpaired Water Bodies
1
Impaired Water Bodies
EPA ATTAINS records identify assessed water bodies that do not meet water-quality standards for designated uses.
Windsor Creek
Reported: Nov 2026
Health-relevant causes: Pesticides
Affected uses: Drinkingwater, Ecological
Data from EPA ATTAINS
Discharge Permits (NPDES)
3
Discharge Permits (NPDES)
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
Air quality and emissions in Windsor
Review historical EPA air pollution records, including monitoring and facility emissions where available. For current conditions, check local air quality on AirNow.
EPA AirToxScreen — Estimated Cancer Risk
EPA AirToxScreen — Estimated Cancer Risk
Sonoma 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
Nonattainment Status
2
Nonattainment Status
EPA designates an area as nonattainment when air quality does not meet federal health-based standards (NAAQS) for a specific pollutant.
San Francisco Bay Area: Ozone
NonattainmentMarginal8-Hour Ozone (2015 Standard)
Original designation: Aug 2018
Health effects (EPA): Respiratory inflammation, aggravation of asthma, reduced lung function (EPA)
San Francisco Bay Area: PM2.5
NonattainmentModeratePM-2.5 (2006 Standard)
Original designation: Dec 2009
Health effects (EPA): Cardiovascular disease, respiratory illness, premature death (EPA)
Maintenance areas
Previously nonattainment; currently meeting the standard and monitored under an EPA maintenance plan.
San Francisco-Oakland-San Jose Area
CO · Carbon Monoxide (1971 Standard)
Classification: Moderate <= 12.7ppm
Original designation: Nov 1990
Current design value: 4.9 ppm (2023-2025)
Data from EPA Green Book
Air Quality Monitoring (AQS)
Air Quality Monitoring (AQS)
EPA annual monitor summaries describe past measurements. For current air quality, see AirNow.
Cloverdale
Annual mean: 6.7 Micrograms/cubic meter (25 C)
Observation year: 2025
Guerneville-Church and 1St
Annual mean: 9.0 Micrograms/cubic meter (25 C)
Observation year: 2025
Healdsburg-Matheson
Annual mean: 9.8 Micrograms/cubic meter (25 C)
Observation year: 2025
Data from EPA AQS
Reviewed: source records as of Q4 2025
Reported Air Emissions (TRI)
1
Reported Air Emissions (TRI)
TRI releases are self-reported annual totals (calendar year 2024). Hover fugitive or stack for definitions.
Northgate Ready Mix
Reported: 2024
Land cleanup and hazardous waste records in Windsor
Reviewed: source query run Nov 2026
Reviewed: source query run Nov 2026
State Remediation & Cleanup Sites
3
State Remediation & Cleanup Sites
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.
3 sites with active cleanup or investigation
590 Caletti Ave, Windsor
1.6 miles away · SONOMA County
Reported: Nov 2026
930 Shiloh Road, Windsor
1.4 miles away · SONOMA County
Reported: Nov 2026
SHILOH ROAD, WINDSOR
1.3 miles away · SONOMA County
Reported: Nov 2026
Data from EPA ECHO
Hazardous Waste — RCRA Handlers
2
Hazardous Waste — RCRA Handlers
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
Underground Storage Tanks
Underground Storage Tanks
No release reports shown in this group.
Reviewed: active/open records as of 2018
Data from EPA UST Finder
Onsite Waste Disposal (TRI Land Releases)
1
Onsite Waste Disposal (TRI Land Releases)
Toxics Release Inventory data — chemicals disposed on-site at reporting facilities.
Northgate Ready Mix
Open data source: View EPA TRI facility recordMSHA Mine and Extraction Sites
2
MSHA Mine and Extraction Sites
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.
No records shown in this group.
Reviewed: status dates within last 5 years
Data from MSHA
County radon potential
County radon potential
Sonoma County, CA
EPA Radon Zone Map (June 2024 release)
Sonoma County is EPA Radon Zone 3 (low potential). EPA defines Zone 3 counties as having predicted average indoor screening levels below 2 pCi/L.
Radon levels can vary from home to home, so EPA recommends testing the property to know its indoor level.
FEMA flood zones and infrastructure in Windsor
FEMA Flood Zones
1
FEMA Flood Zones
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.
EPA Risk Management Program Records
EPA Risk Management Program Records
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
Community Health Indicators
Community Health Indicators
Health outcomes from County Health Rankings. Values shown alongside state and national averages.
Sonoma County, CaliforniaPop. 482,650
County Health Rankings edition: 2024
Premature Death
- County
- 5,764
- State
- 6,373
- National
- 7,972
Poor or Fair Health
- County
- 14.0%
- State
- 15.8%
- National
- 14.2%
Poor Physical Health Days
- County
- 3.4
- State
- 3.1
- National
- 3.3
Poor Mental Health Days
- County
- 5.1
- State
- 4.7
- National
- 4.8
Adult Smoking
- County
- 11.0%
- State
- 8.8%
- National
- 15.0%
Adult Obesity
- County
- 28.6%
- State
- 27.8%
- National
- 34.0%
Air Pollution - Particulate Matter
- County
- 5.7
- State
- 7.1
- National
- 7.3
Drinking water violation indicator
- County
- Yes
- State
- N/A
- National
- N/A
Diabetes Prevalence
- County
- 8.4%
- State
- 10.8%
- National
- 9.6%
Life Expectancy
- County
- 81.1
- State
- 79.9
- National
- 77.6
| Indicator | County | State | National |
|---|---|---|---|
| Premature Death | 5,764 | 6,373 | 7,972 |
| Poor or Fair Health | 14.0% | 15.8% | 14.2% |
| Poor Physical Health Days | 3.4 | 3.1 | 3.3 |
| Poor Mental Health Days | 5.1 | 4.7 | 4.8 |
| Adult Smoking | 11.0% | 8.8% | 15.0% |
| Adult Obesity | 28.6% | 27.8% | 34.0% |
| Air Pollution - Particulate Matter | 5.7 | 7.1 | 7.3 |
| Drinking water violation indicator | Yes | N/A | N/A |
| Diabetes Prevalence | 8.4% | 10.8% | 9.6% |
| Life Expectancy | 81.1 | 79.9 | 77.6 |
Environmental questions about Windsor, California
Has PFAS been found in the water in Windsor, California?
This report does not have PFAS sample results for the candidate water systems in Windsor.
Check with the utility that serves your address for its testing results.
What do EPA records say about tap water in Windsor, California?
EPA drinking water records on this page list 1 violation for the Town of Windsor.
Check your water bill to identify the utility serving your address. Ask that utility about current drinking water advisories.
What do annual air monitors show near Windsor, California?
Nearby EPA monitoring stations provide annual air quality measurements for Windsor.
The monitoring station at Cloverdale recorded an annual average of 6.7 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Guerneville-Church and 1st recorded an annual average of 9 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
The monitoring station at Healdsburg-Matheson recorded an annual average of 9.8 Micrograms/cubic meter (25 C) for particles (PM10) in 2025.
Download 2025 EPA annual monitor dataCurrent air quality on AirNow
Is there radon in Windsor, California?
The radon data for Windsor covers Sonoma County. EPA places this area in Zone 3, with a predicted average indoor radon screening level below 2 picocuries per liter.
Are there Superfund or brownfield sites near Windsor, California?
No Superfund or brownfield sites were returned for this city report.
What is the life expectancy in Windsor, California?
The county data for Windsor reports a life expectancy of 81.1 years in Sonoma County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.
What does the data say about premature deaths in Windsor, California?
The county data for Windsor reports 5,764 years of life lost to deaths before age 75 per 100,000 residents in Sonoma 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.
Is there air pollution in Windsor, California?
The county data for Windsor lists fine-particle pollution (PM2.5) at 5.7 micrograms per cubic meter in Sonoma County, California.
The figure is from the 2024 edition of County Health Rankings, a University of Wisconsin program that publishes county health statistics.