Northern Long Island HUC8 02030201
A 751 km² sub-basin of the Mid-Atlantic region in NY. 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
61
Moderate
Drought index
0
None
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
100%
of 2 reporting
Median flow
70%
p21 of record
Water assets
1,944
5 springs · 1,878 wells
USGS gauges (3)
- MILL NECK CREEK AT MILL NECK NY013030006 cfsp20 · below normal
- COLD SPRING BROOK AT COLD SPRING HARBOR NY013035001 cfsp21 · below normal
- ALLEY CREEK NEAR OAKLAND GARDENS NY013020503 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-19 | 0 | 0 | 2/2 | p21 |
| 2026-10-18 | 0 | 0 | 1/2 | p27 |
| 2026-10-17 | 0 | 0 | 1/2 | p36 |
| 2026-10-16 | 0 | 0 | 2/2 | p21 |
| 2026-10-15 | 0 | 0 | 1/2 | p29 |
| 2026-10-14 | 0 | 0 | 0/2 | p43 |
| 2026-10-13 | 0 | 0 | 0/2 | p58 |
| 2026-10-12 | 0 | 0 | 0/2 | p93 |
| 2026-10-11 | 0 | 0 | 2/2 | p15 |
| 2026-10-10 | 0 | 0 | 2/2 | p16 |
| 2026-10-09 | 0 | 0 | 2/2 | p18 |
| 2026-10-08 | 0 | 0 | 2/2 | p16 |
| 2026-10-07 | 0 | 0 | 2/2 | p16 |
| 2026-10-06 | 0 | 0 | 1/2 | p29 |
Top water assets
- 65Sunken Meadow Creekriver
- 65Sunken Meadow Creekriver
- 65Millers Pond Damreservoir
- 65Fresh Pond Damreservoir
- 65Alley Creek Near Oakland Gardens Nyriver
- 65Wading Riverriver
- 65Mill Pond Damreservoir
- 65Lefferts Grist Mill Damreservoir
- 65Mill Neck Creek At Mill Neck Nyriver
- 65Nissequogue Riverriver