Water Quality in Connecticut
Water hardness and contaminant data for 6 cities across Connecticut. Find your city below to see a detailed water quality profile.
6
Cities
42
Avg Hardness (PPM)
55
Hardest City (PPM)
Connecticut Cities by Water Hardness
| City | Hardness (PPM) | Level | PFAS (ppt) | Source |
|---|---|---|---|---|
| Waterbury | 55 | Slightly Hard | 4 | Wigwam Reservoir system |
| Danbury | 50 | Slightly Hard | 6 | Reservoirs, wells |
| Hartford | 48 | Slightly Hard | 4 | Barkhamsted Reservoir |
| Bridgeport | 41 | Slightly Hard | 4 | Reservoirs |
| New Haven | 34 | Slightly Hard | 5 | Lake Whitney, Lake Gaillard |
| Stamford | 22 | Slightly Hard | 4 | Reservoirs |