Google is using its Street View cars, now equipped with air-quality sensors, to measure air pollution in California on a block-by-block level.

Earlier this year, we shared the first results of this effort with pollution levels throughout the city of Oakland.

We’re just beginning to understand what’s possible with this hyper-local information and today, we’re starting to share some of our findings for the three California regions we’ve mapped: the San Francisco Bay Area, Los Angeles, and California’s Central Valley (the Street View cars drove 100,000 miles, over the course of 4,000 hours to collect this data!) Scientists and air quality specialists can use this information to assist local organizations, governments, and regulators in identifying opportunities to achieve greater air quality improvements and solutions.