Head-to-head water quality
Cleveland, OH vs Miami, FL
Side-by-side water quality comparison: Cleveland (Grade A-) vs Miami (Grade F). Lead, PFAS, violations, and source-water contamination
Score breakdown
Each factor is shown as raw points (out of the maximum). Higher = better.
Factor
Cleveland
Miami
Better
Violations subscore / 45
37.1
0.0
Cleveland
Lead/Copper subscore / 20
16.0
16.0
Tie
Contaminant subscore / 20
18.4
5.9
Cleveland
Compliance subscore / 10
10.0
8.0
Cleveland
Source subscore / 5
4.0
5.0
Miami
Lead & copper at the tap
Lead and Copper Rule (LCR) 90th-percentile readings — the value that 10% of sampled homes exceed.
Factor
Cleveland
Miami
Better
Lead 90th-percentile (latest) · EPA action level: 15 µg/L
0.0 µg/L
0.0 µg/L
Cleveland
Copper 90th-percentile (latest) · EPA action level: 1.3 mg/L
87.3 mg/L
2.5 mg/L
Miami
PFAS — "forever chemicals"
UCMR 5 testing, 2023–2025. Federal MCLs: PFOA + PFOS = 4 ng/L; HFPO-DA = 10 ng/L.
Factor
Cleveland
Miami
Better
PFAS analytes detected
0 of 30
11 of 30
Cleveland
PFAS exceeds federal MCL
No
Yes
Cleveland
PFAS hazard index · Sum of (max/MCL) across detected analytes; > 1 indicates exceedance
—
12.85
Miami
Violation history
SDWA enforcement actions — fewer is better.
Factor
Cleveland
Miami
Better
Violations (last 5 years)
4
57
Cleveland
Health-based violations (total)
2
104
Cleveland
Unresolved violations
3
35
Cleveland
Other contaminants tested
UCMR rounds 1–4 + UCMR 5 lithium. Maxima where data exists; "—" means not tested.
Factor
Cleveland
Miami
Better
Chromium-6 (max)
0.20 µg/L
0.17 µg/L
Miami
HAA5 (avg)
13.20 µg/L
24.26 µg/L
Cleveland
Manganese (max)
3.80 µg/L
3.60 µg/L
Miami
Strontium (max)
210.00 µg/L
1100.00 µg/L
Cleveland
1,4-Dioxane (max)
—
0.13 µg/L
Miami
NDMA (max)
—
7.10 ng/L
Miami
Vanadium (max)
0.70 µg/L
1.80 µg/L
Cleveland
Chlorate (max)
120.00 µg/L
490.00 µg/L
Cleveland
Molybdenum (max)
1.50 µg/L
5.40 µg/L
Cleveland
Industrial proximity
Superfund National Priorities List + Toxic Release Inventory facilities within 10 miles of the city centroid.
Factor
Cleveland
Miami
Better
Superfund sites within 10 mi
0
3
Cleveland
TRI lbs to surface water within 10 mi (2023)
5,023
0
Miami
System size & source
Factor
Cleveland
Miami
Population served
1.3M
2.4M
—
Water source
Surface water
Groundwater
—
Number of water systems
2
8
—
See the full reports
Frequently asked
Which has better water — Cleveland or Miami?
Cleveland, OH scores higher (85.5 vs 35.0) on WaterVerge's 100-point methodology, earning a Grade A- compared to Miami's Grade F. The score combines violation history, lead and copper levels, contaminant testing, monitoring compliance, and source-water type.
How is the WaterVerge water quality score calculated?
The grade combines five subscores: violation history (45 pts, weighted by recency and health-based severity), lead/copper 90th-percentile vs EPA action levels (20 pts), contaminant testing including PFAS, chromium-6, HAA5, NDMA, perchlorate, and Superfund/TRI proximity (20 pts), monitoring compliance (10 pts), and water-source-type risk (5 pts). Full methodology at /about/methodology.
Where does this water quality data come from?
From the EPA's public records: the SDWIS bulk download (violations + system info), UCMR rounds 1–5 (unregulated contaminant testing including PFAS, chromium-6, HAA5, NDMA, perchlorate, vanadium, lithium), the EPA Toxic Release Inventory (industrial polluters), the Superfund National Priorities List, the USGS Powell Domestic-Well Database (private-well chemistry), and the CDC Community Water Fluoridation system. Data is refreshed quarterly.