Water in Seminole County, Florida
38 water systems508,899 residents served72 monitoring wells
Seminole County is served by 38 community water systems, together delivering tap water to roughly 508,899 residents, each measured against federal legal limits from public EPA and Florida records.
Sanford, City ofSanford · 79,715 servedSeminole County SoutheastWinter Pk/Casselbery · 70,040 servedCasselberry, City ofCasselberry · 54,747 servedAltamonte Springs Water DeptAltamonte Springs · 51,000 servedOviedo, City ofOviedo · 47,933 servedSanlandoLongwood · 36,953 servedWinter Springs, City ofWinter Springs · 34,657 servedSeminole County NorthwestSanford · 31,986 servedLongwood, City ofLongwood · 23,237 servedSeminole County NortheastLake Mary · 19,925 servedLake Mary, City ofLake Mary · 17,066 servedSeminole County SouthwestApopka · 9,622 servedWeathersfieldAltamonte Springs · 4,221 servedChase GrovesWinter Park · 4,052 servedChuluota Water SystemChuluota · 3,863 servedApple ValleyAltamonte Springs · 3,269 servedRavenna ParkSanford · 2,105 servedMeredith ManorWinter Park · 1,748 servedMidway-Canaan Water AssociationSanford · 1,500 servedPalm Valley Mobile Home ParkOviedo · 1,476 servedSunshadow ApartmentsCasselberry · 986 servedMullett Lake Water AssociationGeneva · 976 servedJansen S/DApopka · 868 servedDruid HillsAltamonte Springs · 821 servedOakland ShoresAltamonte Springs · 788 servedBlack Hammock -MsbuWinter Park · 781 servedSeminole WoodsGeneva · 780 servedBear Lake ManorApopka · 777 servedLake Harney Water AssociationGeneva · 700 servedOviedo MarketplaceOviedo · 689 servedTwelve Oaks R.v.resortSanford · 500 servedPark RidgeSanford · 246 servedLittle Wekiva EstatesAltamonte Springs · 214 servedLake BrantleyWinter Park · 192 servedHarmony HomesAltamonte Springs · 158 servedLake Mary MHPLongwood · 150 servedDoveraOviedo · 96 servedElder Springs Mobile Home ParkSanford · 62 served
Tap any contaminant for health info, limits, and the highest reading in the county.
Data Sources
EPA SDWISPublic water system identity, population and county for Seminole Countyret. 2026
FDEPChemical monitoring results feeding each utility reportret. 2026
CA OEHHACalifornia public health goals, the health-based benchmark where one is publishedret. 2026
FWROur own benchmarks, only where no government body has published one, each citing the official source it is built onret. 2026
USGS WQPGroundwater chemistry from Seminole County monitoring wellsret. 2026
Informational, from public EPA, Florida and USGS records. Utility figures describe the water each system delivers, not what your own plumbing adds; well figures describe typical county groundwater, not your specific well.
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