How high is the Delaware River at Riegelsville NJ right now?

The Delaware River at Riegelsville NJ is currently flowing at 7,350 cubic feet per second with a gage height of 4.28 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Delaware River at Riegelsville NJ normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 42th percentile compared to the long-term historical record at this gauge.

Is the Delaware River at Riegelsville NJ at flood stage?

No — the gage height is 17.72 feet below the NWS flood-stage threshold of 22.0 feet.

What is the historical median flow for the Delaware River at Riegelsville NJ on June 11?

The long-term median discharge for this date is 8,460 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 0 to unavailable cfs.

Where is the Delaware River at Riegelsville NJ stream gauge located?

The Delaware River at Riegelsville NJ stream gauge is operated by the USGS in Warren County, NJ on the Delaware River. USGS site number 01457500 (coordinates 40.5947, -75.1897).

Delaware River at Riegelsville NJ

USGS Site No: 01457500 • Delaware River • Warren County, NJ

Delaware River at Riegelsville NJ on the Delaware River is currently at 7,350 cfs (Normal — 42th percentile for this date) . Gage height: 4.28 ft.

Reading from 1 week ago

↑ Upstream on Delaware River

Delaware River at Belvidere NJ

Downstream on Delaware River ↓

Delaware River at Trenton NJ

7,350

CFS Discharge

4.28

Gage Height (ft)

Normal

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile	Label	CFS Threshold	Today's Flow
10th	Very Low threshold	0
25th	Low threshold	5,120
50th (Median)	Normal (median)	8,460	Today: 7,350 cfs
75th	High threshold	12,600
95th	Very High threshold	0

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 29, 2026	8,080	—
May 28, 2026	9,560	—
May 27, 2026	11,500	—
May 26, 2026	12,400	—
May 25, 2026	11,800	—
May 24, 2026	8,690	—
May 23, 2026	6,470	—
May 22, 2026	6,840	—
May 21, 2026	7,450	—
May 20, 2026	8,150	—
May 19, 2026	8,840	—
May 18, 2026	9,710	—
May 17, 2026	10,900	—
May 16, 2026	12,300	—
May 15, 2026	12,300	—
Apr 21, 2026	9,300	—
Apr 20, 2026	8,760	—
Apr 19, 2026	8,540	—
Apr 18, 2026	9,570	—
Apr 17, 2026	8,770	—
Apr 16, 2026	8,620	—
Apr 15, 2026	9,410	—
Apr 14, 2026	9,560	—
Apr 13, 2026	10,400	—
Apr 12, 2026	10,700	—
Apr 11, 2026	12,300	—
Apr 10, 2026	13,400	—
Apr 9, 2026	14,300	—
Apr 8, 2026	15,700	—
Apr 7, 2026	17,500	—

Station Information

USGS Site No: 01457500
State: NJ
County: Warren County
Coordinates: 40.5947, -75.1897
Drainage Area: 6,328 mi²
Datum (ft): 124.2
HUC Code: 020401050605

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 15.0 ft
Flood Stage: 22.0 ft
Moderate Flood: 26.0 ft
Major Flood: 30.0 ft

Currently 17.72 ft below flood stage.

Recent Extremes

Max discharge: 68,000 cfs

May 10, 2025
Min discharge: 2,530 cfs

Dec 15, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Mulhockaway Creek at Van Syckel NJ
12.1 mi · 6 cfs

Very Low
Spruce Run at Clinton NJ
14.7 mi · 6 cfs

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Spruce Run at Main Street at Glen Gardner NJ
14.8 mi · 7 cfs

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South Branch Raritan River at Stanton NJ
17.0 mi · 48 cfs

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South Branch Raritan River Near High Bridge NJ
17.3 mi · 46 cfs

Low