Culebrinas-Guanajibo HUC8 21010003
A 1,661 km² sub-basin of the Caribbean region in PR. 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
57
Moderate
Drought index
94
Abnormally dry
Area in D2+
18.75%
0% exceptional (D4)
Gauges below normal
80%
of 5 reporting
Median flow
30%
p8 of record
Water assets
7
2 springs · 0 wells
USGS gauges (7)
- RIO GUANAJIBO NR HORMIGUEROS, PR5013800025 cfsp4 · much below normal
- RIO ROSARIO NR HORMIGUEROS, PR5013640015 cfsp7 · much below normal
- RIO GRANDE DE ANASCO NR SAN SEBASTIAN, PR50144000146 cfsp8 · much below normal
- RIO CULEBRINAS AT HWY 404 NR MOCA, PR50147800178 cfsp25 · below normal
- CANAL DE RIEGO DE LAJAS AT BO. BETANCES, PR501289486 cfsp49 · normal
- RIO GUAJATACA ABV LAGO DE GUAJATACA, PR5001060034 cfsno long-term record
- RIO CULEBRINAS AT MARGARITA DAMSITE NR AGUADA, PR50148890no readingno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 94 | 18.75 | 4/5 | p8 |
Top water assets
- 67Guayo Damreservoir
- 66Yahuecas Damreservoir
- 66Daguey Dam Structure 3reservoir
- 66Prieto Damreservoir
- 66Ajies Dam Structure 2Areservoir
- 39Yeni’s Springspring
- 39Yeni’s Springspring