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The Colorado Department of Public Health and Environment has issued the following... WHAT...Air Quality Health Advisory for Ozone. WHERE...Douglas, Teller, western Elbert, western El Paso and central Arapahoe Counties. Locations include, but are not limited to Castle Rock, Kiowa, Monument, Manitou Springs, and Woodland Park. WHEN...200 PM Tuesday April 21 to 1000 PM Tuesday April 21 IMPACTS...Ozone concentrations could reach the Unhealthy for Sensitive Groups category within the advisory area Tuesday afternoon and evening. Ozone levels will improve overnight Tuesday night. HEALTH INFORMATION...Public Health Recommendations: Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with lung disease, such as asthma. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion.
Mahwah River
Last Updated: April 21, 2026
Maximum discharge along the river is currently at the reporting a streamflow rate of cfs. This is also the highest stage along the Mahwah River, with a gauge stage of ft at this location. This river is monitored from 1 different streamgauging stations along the Mahwah River, the highest being situated at an altitude of ft, the .
The Mahwah River, located in the northern part of New Jersey, stretches for approximately 18 miles.
15-Day Long Term Forecast
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Mahwah River Near Suffern Ny
USGS 01387450 |
10 cfs | 1.77 ft | -10.62 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Mahwah River is a tributary of the Ramapo River in Rockland County, New York and Bergen County, New Jersey in the United States.
The Mahwah River runs on a meandering SSW course for about 11 mi (18 km) from its headwaters just north of the hamlet of Ladentown, New York to its mouth which empties into the Ramapo River in Mahwah, New Jersey, just south of the village of Suffern, New York, and the state line. Its course runs along the length of the Ramapo geologic fault on the eastern edge of Harriman State Park and below the face of the Ramapo Mountain escarpment. Numerous brooks and streams flowing out of the Ramapo Mountains to the west feed the river as it runs south. For most of its length the river's course is roughly paralleled by U.S. Route 202.
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