Air Quality Alert
None

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.

Mongaup River

Last Updated: April 21, 2026

Total streamflow across the Mongaup River was last observed at 322 cfs, and is expected to yield approximately 639 acre-ft of water today; about 69% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 467 cfs, with recent peaks last observed on 2021-10-28 when daily discharge volume was observed at 4,956 cfs.

Maximum discharge along the river is currently at the Mongaup River Near Mongaup Ny reporting a streamflow rate of 194 cfs. However, the streamgauge with the highest stage along the river is the Mongaup River At Mongaup Valley Ny with a gauge stage of 3.45 ft. This river is monitored from 2 different streamgauging stations along the Mongaup River, the highest being situated at an altitude of 1,069 ft, the Mongaup River At Mongaup Valley Ny.

The Mongaup River is a 20-mile-long river located in Sullivan and Orange Counties in New York.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-21
Discharge Volume 639 ACRE-FT
Streamflow 322.0 cfs
Past 24 Hours: -46.0 cfs (-12.5%)
Percent of Normal 68.94%
Maximum 4,956.0 cfs
2021-10-28
Seasonal Avg 467 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Mongaup River At Mongaup Valley Ny
USGS 01432900
128 cfs 3.45 ft -23.35
Mongaup River Near Mongaup Ny
USGS 01433500
194 cfs 1.86 ft -3.48
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

Mongaup River is a stream in the U.S. state of New York. It is a tributary to the Delaware River.
Mongaup is a name derived from an Indian language meaning perhaps "dancing feather" or "huckeberry valley". Variant spellings have been "Mangawping River", "Mingwing River", "Mon-gaw-ping River" and "Mongaap River".