Hawaii HUC8 20010000
A 13,191 km² sub-basin of the Hawaii region in HI. 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
73
Moderate
Drought index
17
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 7 reporting
Median flow
404%
p84 of record
Water assets
1,175
76 springs · 743 wells
USGS gauges (13)
- Kawainui Stream nr Kamuela, HI1672000011 cfsp80 · above normal
- Waikoloa Stream nr Kamuela, HI167570007 cfsp80 · above normal
- Alakahi Stream near Kamuela, HI167250007 cfsp82 · above normal
- Wailuku River nr Kaumana, HI167018008 cfsp84 · above normal
- Honolii Stream nr Papaikou, HI16717000117 cfsp84 · above normal
- Waikoloa Str at Marine Dam nr Kamuela, HI1675800010 cfsp85 · above normal
- Kohakohau Stream above intake, nr Kamuela, HI167561009 cfsp93 · much above normal
- Wailuku River at Piihonua, HI16704000no readingno long-term record
- Hakalau Stream nr alt 1300 ft, HI1671770023 cfsno long-term record
- Manowaiopae Stream near Spencer Road, HI167178158 cfsno long-term record
- Awini Puali Gulch US of Kohala Ditch, HI167515002 cfsno long-term record
- Waiaha Stream at Holualoa, HI167596000 cfsno long-term record
- Paauau Gulch at Pahala, HI16770500no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 17 | 0 | 0/7 | p84 |
| 2026-10-20 | 17 | 0 | 0/7 | p85 |
| 2026-10-19 | 17 | 0 | 0/7 | p99 |
| 2026-10-18 | 17 | 0 | 0/7 | p84 |
| 2026-10-17 | 17 | 0 | 0/7 | p68 |
| 2026-10-16 | 17 | 0 | 2/7 | p50 |
| 2026-10-15 | 17 | 0 | 3/7 | p26 |
| 2026-10-14 | 17 | 0 | 3/7 | p35 |
| 2026-10-13 | 17 | 0 | 3/7 | p36 |
| 2026-10-12 | 17 | 0 | 3/7 | p26 |
| 2026-10-11 | 17 | 0 | 1/7 | p30 |
| 2026-10-10 | 17 | 0 | 1/7 | p33 |
| 2026-10-09 | 17 | 0 | 1/7 | p41 |
| 2026-10-08 | 21 | 0 | 2/8 | p45 |
Top water assets
- 77Deep Basal Fossil Aquifer — Big Island Hawaiifossil_water
- 67Waikoloa Str At Marine Dam Nr Kamuela, Hiriver
- 67Waikoloa Stream Nr Kamuela, Hiriver
- 67Kawainui Stream Nr Kamuela, Hiriver
- 66Keaiwa Reservoirreservoir
- 66Waikoloa Reservoir No. 2reservoir
- 66Waikoloa Reservoir No. 1reservoir
- 66Paauilo Reservoirreservoir
- 65Wailuku River At Piihonua, Hiriver
- 65Puukapu Watershed Retarding Dam R-1reservoir