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 2026-10-13); 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
244%
p78 of record
Water assets
1,573
4 springs · 280 wells
USGS gauges (3)
- YANTIC RIVER AT YANTIC, CT01127500117 cfsp78 · above normal
- POQUONNOCK RIVER AT LONG HILL, CT0111900111 cfsno long-term record
- BRIDE BROOK NR EAST LYME, CT01127796103 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 0 | 0 | 0/1 | p78 |
| 2026-10-20 | 0 | 0 | 0/1 | p82 |
| 2026-10-19 | 0 | 0 | 0/1 | p82 |
| 2026-10-18 | 0 | 0 | 0/1 | p84 |
| 2026-10-17 | 0 | 0 | 0/1 | p89 |
| 2026-10-16 | 0 | 0 | 0/1 | p85 |
| 2026-10-15 | 0 | 0 | 0/1 | p90 |
| 2026-10-14 | 0 | 0 | 0/1 | p93 |
| 2026-10-13 | 0 | 0 | 0/1 | p96 |
| 2026-10-12 | 0 | 0 | 0/1 | p98 |
| 2026-10-11 | 0 | 0 | 0/1 | p58 |
| 2026-10-10 | 0 | 0 | 0/1 | p60 |
| 2026-10-09 | 0 | 0 | 0/1 | p64 |
| 2026-10-08 | 0 | 0 | 0/1 | p65 |
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