Thames HUC8 01100003
A 955 km² sub-basin of the New England region in CT. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
81
Healthy
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 1 reporting
Median flow
267%
p83 of record
Water assets
1,573
4 springs · 280 wells
USGS gauges (3)
- YANTIC RIVER AT YANTIC, CT0112750051 cfsp83 · above normal
- POQUONNOCK RIVER AT LONG HILL, CT011190014 cfsno long-term record
- BRIDE BROOK NR EAST LYME, CT01127796102 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 0 | 0 | 0/1 | p83 |
Top water assets
- 66Deep River Reservoir Damreservoir
- 66Stony Brook Reservoir Damreservoir
- 66Morgan Pond Damreservoir
- 66Congdon Pond Damreservoir
- 66Trading Cove Pond Damreservoir
- 66Mystic Reservoir Damreservoir
- 65Poquonnock Reservoir Damreservoir
- 65Dodson Pond Damreservoir
- 65Brandagee Lake Damreservoir
- 65Oxoboxo Brookriver