High-frequency water quality and discharge data for selected stormwater facilities in Baltimore County, MD, USA

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High-frequency water quality and discharge data for selected stormwater facilities in Baltimore County, MD, USA

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Type:	Resource
Storage:	The size of this resource is 28.0 KB
Created:	Dec 27, 2025 at 1:26 a.m. (UTC)
Last updated:	Jan 19, 2026 at 4:29 a.m. (UTC)
Citation:	See how to cite this resource
Content types:	CSV Content

Sharing Status:	Discoverable
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Abstract

This resource is a repository for water quality and discharge data collected at the inlets and outlets of three stormwater facilities in Baltimore County, MD, USA. EXO sondes outfitted with temperature, SC, and turbidity sensors, SUNAs (for measuring nitrate), and Blue Siren depth and velocity sensors were installed in fall/winter 2025-2026. The EXO sondes and Blue Siren sensors collect data at a 5-minute interval; the SUNAs collect data at a 15-minute interval. The sensor data is complemented by ISCO grab sampling of a subset of storms for laboratory analysis of nitrate, chloride, sulfate, fluoride by ion chromatography; and total nitrogen, total phosphorus, and total suspended sediment by EPA standard methods. The purpose of the data collection is to assess TN, TP, and TSS removal efficiency of the facilities before and after Continuous Monitoring and Adaptive Control (CMAC) installation. The three facilities include two extended detention basins retrofitted with gabion sand filters and one vegetated wet pond. Data are being collected for 2 years. This project is supported by Chesapeake Bay Trust.

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Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Woodlawn, Maryland

North Latitude

39.3388°

East Longitude

-76.7143°

South Latitude

39.2837°

West Longitude

-76.7675°

Temporal

Start Date:
End Date:

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Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
Chesapeake Bay Trust	Evaluation of SmartSWM Continuous Monitoring and Adaptive Control Technology for Improving BMP Effectiveness	25722

How to Cite

Welty, C., M. McWilliams, P. Terhune, A. Miller (2026). High-frequency water quality and discharge data for selected stormwater facilities in Baltimore County, MD, USA, HydroShare, http://www.hydroshare.org/resource/806d64645aad4b268cd7230f176dbbfe

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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