Girty’s Run at Babcock Blvd

Continuous Physicochemical Monitoring Results

*The objective of this report is to present detailed summaries and analyses of collected data. These data may inform protected use assessment decisions, but this report does not include such determinations, which may incorporate additional data or information not included in this report.

Waterbody and Site Descriptions

Stream Name: Girtys Run
Stream Code: 42124
Tributary to: Allegheny River
Stream type: Freestone
Strahler stream order: 1
Designated use(s): Warm Water Fishes
HUC: 05010009 - Lower Allegheny

Site Name: Girty’s Run at Babcock Blvd
Site Code: 123971449-001
County: Allegheny
Latitude: 40.543766
Longitude: -80.029659
Description: Located DNST of Hahn Nursery on Babcock Blvd, about 40 m upstream of the culvert under Babcock Blvd and the parking lots. Sonde located along the left descending side. Transects indicate complete mixing.

Watershed
Drainage area: 2.54 km²
Land uses: 1.6% Forest, 87% Developed, NA% Agriculture
Physiographic province(s): Appalachian Plateaus

Notes: This station was set up to establish a baseline understanding of water quality in a highly developed watershed in the Southwest region of Pennsylvania

Methods

Continuous data are collected and evaluated according to the Continuous Physicochemical Data Collection Protocol. Plots, summary tables, and data downloads are available below. Data are evaluated for exceedances of relevant water quality criteria from 25 Pa. Code § 93.7 and the 99% frequency rule from 25 Pa. Code § 96.3(c) following the Continuous Physicochemical Assessment Method. These evaluations are included to inform assessment decisions, but are not, by themselves, assessment determinations. Calculations for all criteria are shown regardless of whether they apply for this waterbody’s designated use or the specific time of year.

To provide context to changes in water quality, a flow-based parameter such as stream stage or discharge data is reviewed. These data may come from equipment maintained by DEP at the site or data collected nearby by an outside agency. When possible, these data are displayed alongside the water quality data.

Flow-based Reference
Parameter: Stage
Collected by: DEP
Site ID: 123971449-001
Distance from sonde location: N/A
Direction from sonde location (upstream or downstream): N/A

Results

All water quality data are provided for review and download in the table below. Data can be filtered prior to download. Time stamps are UTC-5; daylight savings is not recognized in the dataset. Plots and summaries of individual parameters can be viewed and downloaded within the respective sections below. Use caution when comparing periods, as time-series may not be complete in each period.

All Water Quality Data

Temperature

Full-Range Temperature (C) Statistics

Monthly Temperature (C) Statistics

Specific Conductance

Full-Range Specific Conductance (µS/cm) Statistics

Monthly Specific Conductance (µS/cm) Statistics

pH

Full-Range pH (SU) Statistics

Monthly pH (SU) Statistics

Dissolved Oxygen - Concentration

Full-Range Dissolved Oxygen (mg/L) Statistics

Monthly Dissolved Oxygen (mg/L) Statistics

Dissolved Oxygen (mg/L) 7-day Average Statistics

Dissolved Oxygen - Saturation

Full-Range Dissolved Oxygen (%) Statistics

Monthly Dissolved Oxygen (%) Statistics

Eutrophication Analysis

For small streams (≤50 mi² drainage area), continuous water quality data can be used as part of a eutrophication cause determination of an aquatic life use impairment, as described in the Eutrophication Cause Determination Method for Small Streams. This method incorporates the data in the table below, exceedances of pH and DO criteria (summarized above), benthic chlorophyll-a concentration, and season-specific, regional benchmarks.

DISCLAIMER: these data are provided “as-is” without warranty of any kind, either expressed or implied. Neither The Commonwealth of Pennsylvania nor the Department of Environmental Protection and its’ employees (“Commonwealth”) assume responsibility for errors or omissions in the data or other documents which are referenced by or linked to these data. In no event, shall the Commonwealth be liable for any special, incidental, indirect, or consequential damages of any kind, or any damages whatsoever, including, without limitation, those resulting from loss of use, data or profits, whether or not advised of the possibility of damage, and on any theory of liability, arising out of or in connection with the use or performance of this information. These data could contain technical or other inaccuracies, that could affect the quality for a particular purpose. The Commonwealth may make improvements and/or changes in the product(s) and/or program(s) within this application at any time, with or without notice.