Join us for a unique opportunity to engage with Air District executives and learn about career opportunities and pathways within the organization!
-
About the Air District
- Advisory Council
- Air District Leadership
- Air District Logos
- Bay Area Clean Air Foundation
- Board of Directors
- Community Advisory Council
- Departments
- Diversity Equity and Inclusion
- Hearing Board
- History of Air District
- In Your Community
- Job Opportunities
- Mission Statement
- Request for Proposals (RFP RFQ)
- Speakers and Tours
- News & Events
- Online Services
- Publications
- Forms
- Public Records
- Contact Us
- Login
Napa County
Learn about Napa County - its climate, potential air pollution concerns, and current air quality. You can also view upcoming Air District events in Napa County and read about local efforts to improve air quality.
Napa County is nestled in a valley between the Maycamas Mountains in the west and the Vaca Mountains in the east. One Napa County representative sits on the Air District’s Board of Directors.
Latest News
-
-
Air District’s Clean HEET Program now accepting applicationsMarch 13, 2025
The Air District’s Clean HEET Program is now accepting applications for grants that can help to offset the cost of switching from wood-burning or pellet-burning stoves, fireplace inserts, or open-hearth fireplaces to an electric heat pump. A decommission-only option is also available for homeowners to remove existing open-hearth fireplaces or older, uncertified wood-burning stoves or inserts. Switching to an electric heat pump helps improve air quality in communities by replacing polluting wood-burning devices with cleaner heating options.
Learn More -
Air District launches Charge! Program, expanding Bay Area access to electric vehicle chargersMarch 05, 2025
The Air District is announcing the launch of the Charge! Program’s grant application process to access at least $10 million in grant funding to offset the cost of purchasing and installing new chargers for light-duty electric vehicles at multi-family housing facilities, destinations, transit parking locations, and workplaces across the Bay Area. This funding is available to businesses, homeowner associations, non-profits, public agencies, and tribes. Applications are being accepted now through June 6, 2025, at 5PM.
Learn More -
It has been reported that companies throughout the Bay Area have received letters dated January 1, 2025, February 1, 2025, and February 14, 2025, with misinformation about the Bay Area Commuter Benefits Program. These letters were not sent by the Bay Area Air District or the Metropolitan Transportation Commission and contain misinformation. Please disregard these letters if you received them. If your company is registered in the Commuter Benefits Program, you can check the Commuter Benefits Program website to verify your company's registration in the system.
Learn More -
-
February 13, 2025
-
-
-
February 01, 2025
-
-
Other News Articles
-
1/22/2025 Air District launches new name and branding
January 22, 2025
-
12/30/2024 Air District asks public to not burn wood through the New Year’s holiday
December 30, 2024
-
12/19/2024 Spare the Air Alert issued for Friday, December 20. Wood-burning is prohibited.
December 19, 2024
-
12/8/2024 Spare the Air Alert issued for today, Sunday, December 8
December 8, 2024
-
11/30/2024 Spare the Air Alerts issued for Sunday and Monday due to wood smoke pollution
November 30, 2024
-
11/26/2024 Air District asks public to not burn wood over Thanksgiving holiday
November 26, 2024
-
11/19/2024 Air District to host Clean Air Talk in San Lorenzo on December 7
November 19, 2024
-
11/12/2024 Air District to represent Bay Area at COP29
November 12, 2024
-
11/6/2024 Air District releases woodsmoke white paper for public comment
November 6, 2024
-
10/31/2024 Air District and CARB fine Valero Refining Co. $82 million for air quality violations
October 31, 2024
-
10/25/2024 Air District issues air quality advisory for Friday and Saturday
October 25, 2024
-
10/18/2024 Air District issues air quality advisory for Friday
October 18, 2024
-
10/17/2024 Air District to host Clean Air Talk in East Palo Alto on November 2
October 17, 2024
-
10/17/2024 Air District fines Radius Recycling, formerly Schnitzer Steel, $575,000 for air quality violations
October 17, 2024
Climate
The mountains bordering Napa Valley block much of the prevailing northwesterly winds throughout the year. Sunshine is plentiful in Napa County, and summertime can be very warm in the valley, particularly in the northern end. Winters are usually mild, with cool temperatures overnight and mild-to-moderate temperatures during the day. Wintertime temperatures tend to be slightly cooler in the northern end of the valley. Winds are generally calm throughout the county. Annual precipitation averages range from about 24 inches in low elevations to more than 40 inches in the mountains.
Interactive Air Monitoring Stations Map
Air Quality in Napa County
Ozone and fine particle pollution, or PM2.5, are the major regional air pollutants of concern in the San Francisco Bay Area. Ozone is primarily a problem in the summer, and fine particle pollution in the winter.
In Napa County, ozone rarely exceeds health standards, but PM2.5 occasionally does reach unhealthy concentrations. There are multiple reasons for PM2.5 exceedances in Napa County. First, much of the county is wind-sheltered, which tends to trap PM2.5 within the Napa Valley.
Second, much of the area is well north of the moderating temperatures of San Pablo Bay and, as a result, Napa County experiences some of the coldest nights in the Bay Area. This leads to greater fireplace use and, in turn, higher PM2.5 levels. Finally, in the winter easterly winds often move fine-particle-laden air from the Central Valley to the Carquinez Strait and then into western Solano and southern Napa County.
Spare the Air Status
Last Updated: 4/21/2017