Irondequoit-Ninemile HUC8 04140101
A 1,804 km² sub-basin of the Great Lakes 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
64
Moderate
Drought index
90
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
33%
of 3 reporting
Median flow
92%
p40 of record
Water assets
1,936
6 springs · 1,743 wells
USGS gauges (4)
- ALLEN CREEK NEAR ROCHESTER NY042320505 cfsp7 · much below normal
- IRONDEQUOIT CR ABOVE BLOSSOM RD NEAR ROCHESTER NY042320501063 cfsp40 · normal
- IRONDEQUOIT CR AT RAILROAD MILLS NEAR FISHERS NY0423203420 cfsp47 · normal
- MILL CREEK NEAR WEBSTER NY042320532 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 90 | 0 | 1/3 | p40 |
| 2026-10-20 | 90 | 0 | 1/3 | p53 |
| 2026-10-19 | 90 | 0 | 1/3 | p52 |
| 2026-10-18 | 90 | 0 | 0/3 | p64 |
| 2026-10-17 | 90 | 0 | 0/3 | p78 |
| 2026-10-16 | 90 | 0 | 1/3 | p39 |
| 2026-10-15 | 53 | 0 | 1/3 | p45 |
| 2026-10-14 | 53 | 0 | 1/3 | p53 |
| 2026-10-13 | 53 | 0 | 1/3 | p55 |
| 2026-10-12 | 53 | 0 | 1/3 | p57 |
| 2026-10-11 | 53 | 0 | 1/3 | p49 |
| 2026-10-10 | 53 | 0 | 1/3 | p45 |
| 2026-10-09 | 53 | 0 | 1/3 | p48 |
| 2026-10-08 | 53 | 0 | 0/3 | p76 |
Top water assets
- 66Lock 32 Dam Erie Canalreservoir
- 65Southern Hills Detention Pond Damreservoir
- 65Irondequoit Creekriver
- 65Allen Creek Near Rochester Nyriver
- 65Hugh Hunter Recreational Pond Damreservoir
- 65Mill Creek Near Webster Nyriver
- 65Westbury Damreservoir
- 65Rudy/Dibella Waterski Lake Damreservoir
- 65State University College At Oswego Damreservoir
- 65Irondequoit Cr At Railroad Mills Near Fishers Nyriver