Seminole County
Water purification in Sanford
Seminole County's average sits modestly above the Florida median — but the average hides a wide spread between its best and worst systems. Where your Sanford address falls in that range depends entirely on which system serves your street.
What testing found in Sanford
Largest utility
City of Sanford
serves 79,715 people
6 of 19
detected contaminants exceed EWG health guidelines
- 5.4
- County average above guideline
- 38
- Water systems in county
- 13
- Worst single system in county
Seminole County ranks #27 of 67 Florida counties for contaminants above EWG guidelines — 0.6 above the statewide median of 4.8.
Reported water systems in Seminole County
| System | Serves | Above guideline |
|---|---|---|
| City of SanfordSanford | 79,715 | 6 / 19 |
| Seminole County SoutheastWinter Pk/casselbery | 70,040 | 6 / 16 |
| City of CasselberryCasselberry | 54,747 | 6 / 16 |
| Altamonte Springs Water DepartmentAltamonte Springs | 51,000 | 4 / 14 |
| City of OviedoOviedo | 47,933 | 4 / 12 |
| Sanlando Utilities CorporationLongwood | 36,953 | 3 / 13 |
Seminole is a county of averages that mislead. It ranks 27th of 67 with a 5.4 average, yet its worst single system reaches 13 contaminants above guideline — a spread more than twice the county mean, and wider than Miami-Dade's own gap between average and worst. The City of Sanford system serves nearly 80,000 people at 6 of 19. Two homes a few miles apart in this county can be drinking measurably different water.
What this does and does not mean
EWG's health guidelines are stricter than federal EPA limits, so water that exceeds them is usually still legal to serve. The dataset reports how many contaminants were detected above guideline, not which ones — the only way to know what is in the water at your tap is to test it there.
Source: EWG Tap Water Database (ewg.org/tapwater), data years 2015–2024
What we install in Sanford
Whole-home filtration
Six media beds at the point of entry — catalytic carbon for chlorine, chloramine and PFAS, resins for hardness, KDF for heavy metals, garnet down to 10-20 microns.
Alkaline reverse osmosis
Six stages under the sink for unlimited remineralized drinking water at pH 8.5 to 9.5.
Well water treatment
For homes off city water: a lab analysis first, then a three-tank system tuned to your well's chemistry.
Free water test in Sanford
José Molina will walk your home, test your water on site, and recommend a system. No cost, no obligation, in English or Spanish.
Serving Seminole County · Serving Central Florida, the Treasure Coast & South Florida