Daylight through the yearLongest day (Jun 21): 14 h 20 min5:39 am – 7:59 pmShortest day (Dec 21): 9 h 58 min6:46 am – 4:44 pm
Sun todaySunrise –Sunset –
Natural hazardsOverall risk Very HighSan Diego County, CA, compared with all US countiesHigher-risk hazardsWildfire Very HighRiver flooding Very HighEarthquake Relatively HighLandslide Relatively HighSource: FEMA National Risk Index (county level)
Air quality18% of days had good air in 202564 of 365 days measured268 moderate, 26 unhealthy for sensitive groups, 7 unhealthy daysMedian index 67, worst day 161main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, San Diego County monitors, CA
Drinking waterCity of San Diegoserves 1,385,379 people from surface waterNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system in the county
