Lower Sacramento HUC8 18020163
A 3,182 km² sub-basin of the California region in CA. 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
58
Moderate
Drought index
62
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
75%
of 4 reporting
Median flow
137%
p10 of record
Water assets
1,636
0 springs · 1,510 wells
USGS gauges (18)
- SACRAMENTO R A FREEPORT CA114476504,300 cfsp6 · much below normal
- CACHE C OVERFLOW WEIR FROM SETTLING BAS NR WOOD'LD114528000 cfsp10 · below normal
- CACHE C OUTFLOW FROM SETTLING BASIN NR WOODLAND CA114529000 cfsp10 · below normal
- YOLO BYPASS NR WOODLAND CA1145300028 cfsp80 · above normal
- LAGUNA C NR ELK GROVE CA113365851 cfsno long-term record
- THREEMILE SLOUGH NR RIO VISTA CA1133708018,400 cfsno long-term record
- SUTTER SLOUGH A COURTLAND CA114478303,600 cfsno long-term record
- STEAMBOAT SLOUGH NR WALNUT GROVE CA114478503,680 cfsno long-term record
- SACRAMENTO R AB DELTA CROSS CHANNEL CA114478903,260 cfsno long-term record
- SACRAMENTO R BL GEORGIANA SLOUGH CA114479054,640 cfsno long-term record
- TOE DRAIN A LIBERTY ISLAND NR COURTLAND CA11455140-949 cfsno long-term record
- SHAG SLOUGH A LIBERTY ISLAND NR COURTLAND CA11455276no readingno long-term record
- CACHE SLOUGH AB RYER ISLAND FERRY NR RIO VISTA CA114553856,770 cfsno long-term record
- SACRAMENTO R A RIO VISTA CA1145542078,600 cfsno long-term record
- SACRAMENTO R BL WALNUT GROVE BR A WALNUT GROVE CA3814271213054013,810 cfsno long-term record
- NEMETH SLOUGH NR COURTLAND CA381807121413801105 cfsno long-term record
- GREEN SLOUGH NR COURTLAND CA381905121413901-14 cfsno long-term record
- LIBERTY ISLAND A LOWER STAIR STEP NR COURTLAND CA381917121411701618 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-18 | 62 | 0 | 3/4 | p10 |
| 2026-10-17 | 62 | 0 | 3/4 | p10 |
| 2026-10-16 | 62 | 0 | 3/4 | p11 |
| 2026-10-15 | 62 | 0 | 2/4 | p25 |
| 2026-10-14 | 62 | 0 | 2/4 | p29 |
| 2026-10-13 | 62 | 0 | 2/4 | p35 |
| 2026-10-12 | 62 | 0 | 2/4 | p39 |
| 2026-10-11 | 62 | 0 | 2/4 | p40 |
| 2026-10-10 | 62 | 0 | 2/4 | p39 |
| 2026-10-09 | 62 | 0 | 2/4 | p38 |
| 2026-10-08 | 62 | 0 | 2/4 | p35 |
| 2026-10-07 | 62 | 0 | 2/4 | p32 |
| 2026-10-06 | 62 | 0 | 2/4 | p30 |
| 2026-10-05 | 62 | 0 | 2/4 | p25 |
Top water assets
- 65Sacramento R A Rio Vista Cariver
- 65Cache C Outflow From Settling Basin Nr Woodland Cariver
- 65Sacramento R Ab Delta Cross Channel Cariver
- 65Threemile Slough Nr Rio Vista Cariver
- 65Green Slough Nr Courtland Cariver
- 65Nemeth Slough Nr Courtland Cariver
- 65Cache Slough Ab Ryer Island Ferry Nr Rio Vista Cariver
- 65Sutter Slough A Courtland Cariver
- 65Yolo Bypass Nr Woodland Cariver
- 65Steamboat Slough Nr Walnut Grove Cariver