Imperial Reservoir HUC8 15030104
A 8,924 km² sub-basin of the Lower Colorado region in AZ, CA. 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
50
Moderate
Drought index
200
Severe
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
60%
of 10 reporting
Median flow
65%
p12 of record
Water assets
5,931
10 springs · 4,275 wells
USGS gauges (10)
- PVID D23 SPILL NEAR BLYTHE, CA094291800 cfsp1 · much below normal
- POSTON WASTEWAY NEAR POSTON, AZ0942851076 cfsp8 · much below normal
- PALO VERDE CANAL NEAR BLYTHE, CA094290001,020 cfsp9 · much below normal
- PVID C CANAL SPILL NEAR BLYTHE, CA0942920021 cfsp10 · much below normal
- PALO VERDE DRAIN NEAR PARKER, AZ0942903014 cfsp10 · much below normal
- PVID F-CANAL SPILL NEAR BLYTHE, CA094291554 cfsp14 · below normal
- CRIR LWR MAIN DRAIN BLW TYSON WW, NR EHRENBERG, AZ09429070162 cfsp28 · normal
- GARDNER LATERAL SPILL NEAR PARKER, AZ094285052 cfsp42 · normal
- COLORADO RIVER BELOW PALO VERDE DAM, AZ-CA094291007,990 cfsp63 · normal
- CRIR MAIN CANAL NEAR PARKER, AZ094285001,140 cfsp76 · above normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 200 | 0 | 6/10 | p12 |
Top water assets
- 66Headgate Rockreservoir
- 66Palo Verde Diversionreservoir
- 66Imperial Diversion Damreservoir
- 65Crir Lwr Main Drain Blw Tyson Ww, Nr Ehrenberg, Azriver
- 65Pvid C Canal Spill Near Blythe, Cariver
- 65Gardner Lateral Spill Near Parker, Azriver
- 65Poston Wasteway Near Poston, Azriver
- 65Crir Main Canal Near Parker, Azriver
- 65Colorado Riverriver
- 65Palo Verde Drain Near Parker, Azriver