Maui HUC8 20020000
A 3,243 km² sub-basin of the Hawaii region in HI. 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
69
Moderate
Drought index
15
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
0%
of 15 reporting
Median flow
1486%
p95 of record
Water assets
1,169
95 springs · 897 wells
USGS gauges (21)
- Wailuku River at Kepaniwai Park, Maui, HI1660450036 cfsp48 · normal
- Waihee Rv abv Waihee Dtch intk nr Waihee, Maui, HI16614000106 cfsp81 · above normal
- Ukumehame Gulch nr Olowalu, Maui, HI1664700020 cfsp88 · above normal
- Puohokamoa Str ab Spreckels Ditch, Maui, HI1654500097 cfsp92 · much above normal
- Honokohau Stream near Honokohau, Maui, HI16620000141 cfsp93 · much above normal
- Kahakuloa Stream near Honokohau, Maui, HI1661800051 cfsp94 · much above normal
- Honomanu Stream near Keanae, Maui, HI16527000100 cfsp95 · much above normal
- Haipuaena Stream abv Spreckels Ditch, Maui, HI1653600064 cfsp95 · much above normal
- Nailiilihaele Stream near Huelo, Maui, HI16570000292 cfsp97 · much above normal
- West Wailuaiki Stream near Keanae, Maui, HI16518000130 cfsp98 · much above normal
- Honopou Stream near Huelo, Maui, HI1658700046 cfsp98 · much above normal
- Hanawi Stream near Nahiku, Maui, HI16508000163 cfsp99 · much above normal
- Waikamoi Str abv Kula PL intake nr Olinda, Maui,HI165528004 cfsp99 · much above normal
- Oheo Gulch at dam near Kipahulu, Maui, HI16501200715 cfsp99 · much above normal
- Kahoma Stream at Lahaina, Maui, HI1663850071 cfsp100 · much above normal
- Honomanu Stream near Hana Hwy, Maui, HI165275000 cfsno long-term record
- Wailuku River at Iao Valley Road, Maui, HI16605500no readingno long-term record
- S Waiehu Str US of ditch at alt. 315 ft, Maui, HI1661150018 cfsno long-term record
- Kauaula Stream US of ditch diversion, Maui, HI1664100015 cfsno long-term record
- Kauaula Stream DS of ditch diversion, Maui, HI16643100no readingno long-term record
- Waikapu Str US of S Waikapu Dt intake, Maui, HI1664790030 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 15 | 0 | 0/15 | p95 |
Top water assets
- 72Hawaiian Volcanic-Rock Aquifer — Maui Central Valleyaquifer
- 66Papaaea Reservoirreservoir
- 66Pauwela Reservoirreservoir
- 66Horner Reservoirreservoir
- 66Mahinahina Reservoirreservoir
- 66Napili 2-3 Desilting Basinreservoir
- 66Kahoma Reservoirreservoir
- 66Maui Reservoir 20reservoir
- 66Reservoir 140reservoir
- 66Kahana Nui Damreservoir