waterbycounty
Compiled federal source snapshot

Florida Water Quality

Drinking water data for all 67 counties.

Avg SDWIS Compliance Index

57.3

Most Common Five-Year SDWIS Compliance Band

A

Counties with Data

67

of 67 total

County water atlas

Florida water signals by county

A state-level 2.5D view across drinking-water compliance, watershed impairment, monitoring density, and streamflow snapshot context. Pin any county, switch layers, then use the lens controls to compare index ranges, recorded violation rates, or impaired watersheds without leaving the page.

Counties

67

Avg SDWIS index

57.3

Watersheds

67

ATTAINS counties

Monitoring

67

56 fresh USGS snapshots

State atlas layers combine EPA SDWIS health-based violations, EPA ATTAINS 303(d) impairment assessments, EPA Water Quality Portal monitoring sites, and representative USGS NWIS streamflow gauges. Streamflow values appear only for fresh pipeline snapshots, not as a continuously updated stream. County pages include the observation time and year.

Prepared by ByCounty Editorial TeamPublished by WaterByCounty

Multi-source coverage in Florida

Beyond Drinking Water

EPA SDWIS

67/ 67

counties with drinking-water compliance data

583 health violations statewide (5yr)

EPA ATTAINS

76.2%

avg impaired across 67 counties

19,926 of 27,119 assessed bodies impaired

EPA WQP

23,380

monitoring sites across 67 counties

5,448,262 total readings (5yr window)

USGS NWIS

56

counties with a fresh pipeline snapshot

5 above47 below

State atlas notes

What stands out in Florida

County water quality is not one number. The strongest read comes from comparing drinking-water compliance against watershed impairment, monitoring density, and streamflow context. Use these signals as a starting point, then open any county profile for source-level detail.

Compliance spread

Baker County has the highest value in the published state SDWIS Compliance Index table at 86.2/100, while Putnam County has the lowest at 8.4/100. That is a 77.8 point gap inside one state.

Zero health violations

10

3+ health violations

41

Watershed pressure

The atlas impairment layer points to counties where assessed water bodies are most likely to miss state quality standards. Assessment density varies, so compare the percentage with the number of assessed bodies on the county page.

Madison County88.7%Dixie County88.6%Lafayette County86.2%

Monitoring hubs

Lee County3,032 sitesPinellas County2,301 sitesHillsborough County2,161 sites

Lowest flow reads

Union County1%Hernando County3%Columbia County5%

Highest fresh streamflow pipeline snapshots: Duval County (2741%, observation 2026), Monroe County (892%, observation 2026), Dixie County (203%, observation 2026). These are source-data observations, not household tap-water conclusions.

All Florida Counties

CountySDWIS Compliance Index
Baker County86.2
Calhoun County86.2
Escambia County86.2
Gilchrist County86.2
Hamilton County86.2
Indian River County86.2
Jefferson County86.2
Lafayette County86.2
Sarasota County86.2
Union County86.2
Duval County71.9
Alachua County71.5
Okaloosa County71.5
Broward County71.2
Miami-Dade County71.2
Santa Rosa County71.2
St. Johns County71.2
Clay County70.7
Hernando County70.7
Manatee County70.3
Orange County70.3
Hillsborough County69.8
Walton County69.8
Leon County69.3
Pinellas County69.3
Brevard County68.8
Palm Beach County68.5
Lee County67.4
Volusia County67.4
Pasco County65.1
Gadsden County64.1
Collier County63.8
Seminole County62.9
Monroe County62.3
Nassau County58.3
Marion County58.1
Osceola County57.8
Citrus County56.2
St. Lucie County55.7
Bay County54.9
Hardee County54.9
Bradford County54.5
Suwannee County53.0
Martin County52.9
Flagler County51.8
Polk County51.6
Okeechobee County51.2
Charlotte County50.8
Lake County49.3
Wakulla County49.3
Jackson County45.6
Sumter County43.8
Gulf County42.2
Franklin County38.9
Dixie County37.9
Levy County34.1
Highlands County33.6
Hendry County30.5
Liberty County25.1
DeSoto County25.0
Glades County24.6
Madison County22.0
Holmes County19.9
Taylor County16.0
Washington County13.4
Columbia County8.7
Putnam County8.4

Frequently Asked Questions

Which Florida county has the highest SDWIS Compliance Index?
Baker County has the highest SDWIS Compliance Index in the published Florida cohort at 86.2/100. This WaterByCounty relative comparison is not an EPA score and does not establish current conditions for a utility or address.
What does the Five-Year SDWIS Compliance Band mean?
The band is derived only from each county aggregation's recorded health-violation rate per 100,000 people served for the stated five-year source window. It is separate from the relative SDWIS Compliance Index and is not a current determination for a specific utility or address.
What does EPA ATTAINS report across Florida?
Across 67 published Florida county records with EPA ATTAINS data, 19,926 of 27,119 assessed water bodies are listed as impaired. This is a watershed assessment and does not describe finished household tap water.
Which USGS streamflow records are shown across Florida?
WaterByCounty has 56 fresh USGS pipeline snapshots in the published Florida cohort. Each county page shows its observation timestamp and year. A pipeline snapshot is not a continuously updated reading or a tap-water safety measure.
Where can Florida residents find current official information?
Review the applicable utility's Consumer Confidence Report, active notices, and the state drinking-water agency. WaterByCounty's county-level historical aggregations do not establish the current status of a specific utility, address, private well, or household plumbing system.
What does Water Quality Portal monitoring volume show in Florida?
The published county records contain 5,448,262 results from 23,380 monitoring locations in the site's five-year aggregation. Monitoring volume does not by itself indicate better or worse water quality.

Data Sources

Drinking-water compliance data from the EPA Safe Drinking Water Information System (SDWIS) via the ECHO enforcement database. The WaterByCounty SDWIS Compliance Index reflects the recorded rate and is not an EPA score.

Disclaimer: This data is informational only. It is not health, legal, or professional advice. For concerns about your specific water supply, contact your local water utility.

← Back to All States

Explore more data for Florida

Property TaxCost of LivingCrime RateIncomeHealthSchoolsDisaster RiskWeatherCounty Score