Air Quality Info

 

Current Air Quality Health Advisories in place:

To receive email alerts for Health Advisories directly in your inbox:
CLICK HERE

To view past advisories:
CLICK HERE

Choose a location to view the current air quality:

Grass Valley ▪ Truckee ▪ Portola
Quincy ▪ Chester

AQI Animation - http://www.epa.gov/airnow/today/anim_aqi_ca_nv.gif
Map data is collected from AirNow.gov.

AIR QUALITY INDEX

air quality index

Choose a location to view the current air quality:

Grass Valley


Truckee


Portola


Quincy


Chester

AQI Forecast

Nevada County

This forecast is for the pollutant: ozone (O3)

DATE DAY FORECAST AQI ACTUAL AQI
06 / 21 / 17 Wed 120 129
06 / 22 / 17 Thu 120 101
06 / 23 / 17 Fri 110 182
06 / 24 / 17 Sat 110 164
06 / 25 / 17 Sun 100 100
06 / 26 / 17 Mon 90
06 / 27 / 17 Tue 80
06 / 28 / 17 Wed 90
06 / 29 / 17 Thu 95
06 / 30 / 17 Fri 100
07 / 01 / 17 Sat 100

Western Nevada County was hammered by high ozone values over the weekend. Fortunately, relief is on its way with the passing of the intense heat wave. Ozone levels should remain at the high end of Moderate until July.

This forecast will be updated on Friday, June 30 or sooner if necessary.


This forecast will be updated on Friday, June 23 or sooner if necessary.

In October of 2015 the EPA modified the National Ambient Air Quality Standard (NAAQS) for ozone. The old standard was 75 ppb (8 hour average). The new standard is now 70 ppb (8 hour average). Since the AQI values are based on the NAAQS, that means the AQI values are going to be a little higher this year even if the ozone values are identical to last year. Hence, we are going to have more days in the Moderate range in 2016, and even more days in the Unhealthy for Sensitive Groups range.

You may or may not have noticed, but one of the things that is unique and special about my ozone AQI forecast is that unlike almost everybody else, I let you see what the forecast was. That allows the user an opportunity to see how accurate my forecast is (or is not). That is a feature I wish the weather web sites and other AQI forecasters would add to their web pages.For Western Nevada County only, check out Ozone Maps at http://www.sparetheair.com/

To check out PM2.5 data for both Eastern and Western Nevada County, click here.  Be sure to set PM2.5 for the Parameter, and in Step 3 set the county to “Nevada”

Plumas County

To Check current PM 2.5 conditions click here. Be sure to set PM2.5 for the Parameter, and in Step 3 set the county to “Plumas”