Important Legacy real-time page
Available data
Select data types to graph from categories based on the way the data were collected.
Learn about the data collection categories Continuous data
3 data types available - data from 1988-02-02 to 2026-09-02
Daily data
3 data types available - data from 1967-10-01 to 2026-09-01
Field measurements
2 data types available - data from 1968-08-04 to 2026-06-11
Discrete sample data
831 Observed properties (data types) available - with data from 1978-01-29 to 2026-08-11
1923 Sampling activities
Peak measurements
2 data types available - with data from 1968-03-25 to 2025-05-09
Statistical tables for select daily data types
3 data types available - data from 1967-10-01 to 2026-09-01
Important information about this monitoring location
For information about dam operations, call 1-888-457-4076 or contact Exelon Energy (http://www.exeloncorp.com/) LOCATION.-- On downstream side of Conowingo Dam, 1.0 mi southwest of Conowingo, and 9.9 mi upstream from mouth. PERIOD OF RECORD.-- October 1967 to current year. GAGE.--Water-stage recorder. Datum of gage is 4.13 ft above North American Vertical Datum of 1988. REMARKS.-- Flow regulated by Conowingo Reservoir beginning October 1928, usable capacity, 55,070,000,000 gal; dead storage, 45,290,000,000 gal. Records do not include a small infrequent diversion upstream from station to augment municipal supply of city of Baltimore. Records of diversion available from Baltimore City Department of Public Works. PERIOD OF RECORD (Water Quality).-- 1978 to current year.
Monitoring locations with continuous data in last 120 days
No locations found
