Interactive tool
Suffolk vs Miami-Dade
Put any two U.S. counties side by side on drinking-water violations, PFAS detection, and system coverage, straight from EPA SDWIS and UCMR5 testing.
- 3,254
- Counties available
- 63
- States & territories
- 142,471
- Water systems covered
According to the EPA's Safe Drinking Water Information System (SDWIS) and UCMR5 testing program, every figure in this comparison is pulled directly from official public water-system records. See our methodology for how violations and PFAS detections are counted.
Choose Counties to Compare
Water Systems
Water Systems
8
167
Population Served
3,456,243
3,325,406
Systems with Violations
7
(87.5%)
148
(88.6%)
Violations
Total Violations
111
3,677
Health-Based Violations
MCL exceedances & treatment failures
71
(64.0%)
869
(23.6%)
Avg Violations / System
13.9
22.0
PFAS Contamination
Systems Tested for PFAS
4
17
PFAS Detected
1(25.0% rate)
17(100.0% rate)
Better relative to comparison
Worse relative to comparison
Equal / neutral
Suffolk County, Full Profile
Massachusetts · 8 systems · 3,456,243 served
Miami-Dade County, Full Profile
Florida · 167 systems · 3,325,406 served
Data source: EPA Safe Drinking Water Information System (SDWIS) and UCMR5 PFAS monitoring program.
Teal = better (fewer violations / more systems),
amber = worse (more violations / fewer systems).
Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.