How high is the Passaic River Near Chatham NJ right now?

The Passaic River Near Chatham NJ is currently flowing at 68 cubic feet per second with a gage height of 3.63 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Passaic River Near Chatham NJ normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 54th percentile compared to the long-term historical record at this gauge.

Is the Passaic River Near Chatham NJ at flood stage?

No — the gage height is 2.37 feet below the NWS flood-stage threshold of 6.0 feet.

What is the historical median flow for the Passaic River Near Chatham NJ on June 11?

The long-term median discharge for this date is 60 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 24 to 458 cfs.

Where is the Passaic River Near Chatham NJ stream gauge located?

The Passaic River Near Chatham NJ stream gauge is operated by the USGS in Morris County, NJ on the Passaic River. USGS site number 01379500 (coordinates 40.7261, -74.3897).

Passaic River Near Chatham NJ

USGS Site No: 01379500 • Passaic River • Morris County, NJ

Passaic River Near Chatham NJ on the Passaic River is currently at 68 cfs (Normal — 54th percentile for this date) . Gage height: 3.63 ft.

Reading from 1 week ago

↑ Upstream on Passaic River

Passaic River Near Millington NJ

Downstream on Passaic River ↓

Passaic River at Pine Brook NJ

CFS Discharge

3.63

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	24
25th	Low threshold	36
50th (Median)	Normal (median)	60
75th	High threshold	111	Today: 68 cfs
95th	Very High threshold	458

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	77	—
May 28, 2026	107	—
May 27, 2026	154	—
May 26, 2026	188	—
May 25, 2026	185	—
May 24, 2026	136	—
May 23, 2026	44	—
May 22, 2026	42	—
May 21, 2026	45	—
May 20, 2026	36	—
May 19, 2026	36	—
May 18, 2026	37	—
May 17, 2026	39	—
May 16, 2026	42	—
May 15, 2026	45	—
Apr 21, 2026	51	—
Apr 20, 2026	54	—
Apr 19, 2026	58	—
Apr 18, 2026	62	—
Apr 17, 2026	65	—
Apr 16, 2026	67	—
Apr 15, 2026	66	—
Apr 14, 2026	67	—
Apr 13, 2026	69	—
Apr 12, 2026	72	—
Apr 11, 2026	77	—
Apr 10, 2026	84	—
Apr 9, 2026	90	—
Apr 8, 2026	102	—
Apr 7, 2026	113	—

Station Information

USGS Site No: 01379500
State: NJ
County: Morris County
Coordinates: 40.7261, -74.3897
Drainage Area: 100 mi²
Datum (ft): 193.5
HUC Code: 02030103

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 5.5 ft
Flood Stage: 6.0 ft
Moderate Flood: 8.0 ft
Major Flood: 10.0 ft

Currently 2.37 ft below flood stage.

Recent Extremes

Max discharge: 987 cfs

Mar 8, 2026
Min discharge: 17 cfs

Oct 7, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Canoe Brook Near Summit NJ
2.3 mi · 2 cfs

Normal
Rahway River Near Springfield NJ
4.9 mi · 12 cfs

Normal
Whippany River at Morristown NJ
6.6 mi · 26 cfs

Low
Passaic River Near Millington NJ
8.0 mi · 27 cfs

Normal
Whippany River Near Pine Brook NJ
8.5 mi · 48 cfs

Low