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Central Florida service area

Seminole County, FL

County water overview

Seminole County splits between Seminole County Environmental Services and the city systems in Sanford, Altamonte Springs, Oviedo, Winter Springs, Lake Mary, Longwood, and Casselberry. Rural east Seminole is largely private well.

14

Cities mapped

59

Neighborhoods

10

Water systems

July 29, 2026

Data reviewed

Cities

Pick your city, then your neighborhood.

Geneva

66/100

Geneva is largely unincorporated and served by private wells drawing directly from the Floridan Aquifer. Expect hard water with notable iron and sulfur (rotten-egg odor), and no chlorine residual to control bacteria — annual well testing and whole-home treatment are strongly recommended.

2 neighborhoods mapped

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Black Hammock

66/100

Black Hammock is largely unincorporated and served by private wells drawing directly from the Floridan Aquifer. Expect hard water with notable iron and sulfur (rotten-egg odor), and no chlorine residual to control bacteria — annual well testing and whole-home treatment are strongly recommended.

1 neighborhoods mapped

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Midway

65/100

Midway is served by a patchwork of municipal connections and private wells, both drawing on the Floridan Aquifer. Hardness runs high throughout, with well-fed pockets showing more iron and sulfur than city-served streets.

1 neighborhoods mapped

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Chuluota

62/100

Chuluota is largely unincorporated and served by private wells drawing directly from the Floridan Aquifer. Expect hard water with notable iron and sulfur (rotten-egg odor), and no chlorine residual to control bacteria — annual well testing and whole-home treatment are strongly recommended.

3 neighborhoods mapped

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Forest City

60/100

Forest City is served by a patchwork of municipal connections and private wells, both drawing on the Floridan Aquifer. Hardness runs high throughout, with well-fed pockets showing more iron and sulfur than city-served streets.

2 neighborhoods mapped

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Altamonte Springs

59/100

Altamonte Springs draws its water from the Floridan Aquifer via City of Altamonte Springs. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

7 neighborhoods mapped

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Fern Park

59/100

Fern Park draws its water from the Floridan Aquifer via Seminole County Utilities. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

2 neighborhoods mapped

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Casselberry

57/100

Casselberry draws its water from the Floridan Aquifer via City of Casselberry. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

5 neighborhoods mapped

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Longwood

56/100

Longwood draws its water from the Floridan Aquifer via City of Longwood. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

6 neighborhoods mapped

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Sanford

55/100

Sanford draws its water from the Floridan Aquifer via City of Sanford. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

7 neighborhoods mapped

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Lake Mary

55/100

Lake Mary draws its water from the Floridan Aquifer via City of Lake Mary. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

6 neighborhoods mapped

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Oviedo

54/100

Oviedo draws its water from the Floridan Aquifer via City of Oviedo. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

7 neighborhoods mapped

View report

Heathrow

54/100

Heathrow draws its water from the Floridan Aquifer via City of Lake Mary / Seminole County Utilities. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

4 neighborhoods mapped

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Winter Springs

52/100

Winter Springs draws its water from the Floridan Aquifer via City of Winter Springs. Hardness runs from moderate to very high citywide, and disinfection byproducts along with hardness scale are the most common resident complaints.

6 neighborhoods mapped

View report

Who supplies the water

Public water systems operating in Seminole County.

City of Sanford Utilities

City-operated wells and treatment serving Sanford.

2024 Consumer Confidence Report ↗

City of Altamonte Springs Public Works

City-operated system serving Altamonte Springs.

2024 Consumer Confidence Report ↗

City of Casselberry Utilities

Unconfirmed

City-operated system serving Casselberry.

City of Lake Mary Public Works

Unconfirmed

City system; some Lake Mary addresses are served by Seminole County Environmental Services instead.

City of Longwood Utilities

Unconfirmed

City-operated system serving Longwood.

City of Oviedo Public Works

City-operated system serving Oviedo; nearby unincorporated areas fall under Seminole County.

2024 Consumer Confidence Report ↗

City of Winter Springs Utility Department

Unconfirmed

City-operated system serving Winter Springs.

Seminole County Environmental Services

County system serving most unincorporated Seminole County across multiple separate treatment plants.

2024 Consumer Confidence Report ↗

Private well (no public water system)

Homes here draw directly from the Floridan Aquifer through a private well. Private wells are not regulated, not treated, and not tested by any agency — there is no CCR for this address because no one is required to produce one.

City / well mix

Unconfirmed

We have not yet confirmed which public water system serves this address against EPA SDWIS and the operator's own service-area map.

Every number on the city and neighborhood pages traces back to one of these systems. See our full sources & methodology.