Raritan HUC8 02030105
A 2,863 km² sub-basin of the Mid-Atlantic region in NJ. 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
82
Healthy
Drought index
7
Abnormally dry
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
8%
of 24 reporting
Median flow
143%
p61 of record
Water assets
5,417
7 springs · 985 wells
USGS gauges (33)
- Spruce Run at Clinton NJ013968004 cfsp4 · much below normal
- South B Rockaway Creek at Whitehouse Station NJ013996704 cfsp23 · below normal
- South Branch Raritan River at Stanton NJ0139700081 cfsp26 · normal
- Green Brook at Seeley Mills NJ014034001 cfsp29 · normal
- West Branch Middle Brook near Martinsville NJ014031500 cfsp38 · normal
- Raritan River at Manville NJ01400500285 cfsp53 · normal
- North Branch Raritan River near Far Hills NJ0139850017 cfsp53 · normal
- Middle Brook at Burnt Mills NJ013991002 cfsp55 · normal
- Stony Brook at Watchung NJ014035402 cfsp59 · normal
- Raritan River below Calco Dam at Bound Brook NJ01403060331 cfsp60 · normal
- Bound Brook at Middlesex NJ0140390027 cfsp60 · normal
- Deep Run at Old Bridge NJ0140605010 cfsp60 · normal
- Lamington (Black) River near Pottersville NJ0139950027 cfsp62 · normal
- Mulhockaway Creek at Van Syckel NJ013966607 cfsp63 · normal
- North Branch Raritan River near Raritan NJ01400000126 cfsp65 · normal
- Royce Brook at Hamilton Road near Manville NJ014026304 cfsp69 · normal
- South Branch Raritan River near High Bridge NJ0139650067 cfsp72 · normal
- Spruce Run at Main Street at Glen Gardner NJ013965828 cfsp73 · normal
- Manalapan Brook at Spotswood NJ0140540035 cfsp73 · normal
- Lawrence Brook at Westons Mills NJ0140503025 cfsp80 · above normal
- Millstone River at Blackwells Mills NJ01402000205 cfsp83 · above normal
- Neshanic River at Reaville NJ013980009 cfsp86 · above normal
- Pike Run at Belle Mead NJ014016502 cfsp87 · above normal
- Stony Brook at Princeton NJ0140100025 cfsp92 · much above normal
- South Branch Raritan River at Four Bridges NJ0139619016 cfsno long-term record
- Holland Brook at Readington NJ0139810731 cfsno long-term record
- Lamington (Black) River at Succasunna NJ013991909 cfsno long-term record
- Lamington (Black) River near Ironia NJ0139920011 cfsno long-term record
- Peters Brook near Raritan NJ014003006 cfsno long-term record
- Millstone River at Carnegie Lake at Princeton NJ01401301187 cfsno long-term record
- Green Brook at Plainfield NJ0140350010 cfsno long-term record
- East Br Stony Brook at Best Lake at Watchung NJ014035351 cfsno long-term record
- Delaware and Raritan Canal at Kingston NJ0146050035 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 7 | 0 | 2/24 | p61 |
Top water assets
- 73Early Mesozoic Basin Aquifer — Newark Basinaquifer
- 66Spruce Run Reservoir Damreservoir
- 66Pleasant Valley Lake Damreservoir
- 66Farrington Damreservoir
- 66Silver Lake Damreservoir
- 66East Branch Reservoir Damreservoir
- 65Assiscong Creekriver
- 65North Branch Raritan Riverriver
- 65Holland Brook At Readington Njriver
- 65Westons Arch Damreservoir