Daylight through the yearLongest day (Jun 21): 15 h 19 min5:06 am – 8:26 pmShortest day (Dec 21): 9 h 3 min7:11 am – 4:14 pm
Sun todaySunrise –Sunset –
Natural hazardsOverall risk Relatively HighEssex County, MA, compared with all US countiesHigher-risk hazardsCoastal flooding Very HighIce storm Very HighRiver flooding Relatively HighLightning Relatively HighSource: FEMA National Risk Index (county level)
Air quality81% of days had good air in 2025296 of 365 days measured66 moderate, 3 unhealthy for sensitive groups daysMedian index 40, worst day 136main pollutant: ozoneSource: US EPA Air Quality Index, Essex County monitors, MA
Drinking waterAndover Water Deptserves 36,569 people from surface water2 health-based violations since 2021latest Jan 2022: lead and copper, treatment techniqueSource: US EPA Safe Drinking Water Information System, largest system serving the town
