Continuous Instream Monitoring (CIM) Reports

Continuous Instream Monitoring

Streams, rivers, and lakes are dynamic systems that often require monitoring on a frequent basis to better understand the larger picture of water quality. As a result, the Pennsylvania Department of Environmental Protection (DEP) Division of Water Quality Standards uses deployable instream monitors that collect data up to every 15 minutes. DEP commonly configures instream monitors to measure four parameters: water temperature, specific conductance, pH and dissolved oxygen. Monitors can also be configured to measure additional stream properties such as turbidity and water depth. Deployments are usually for one year but may be shortened in order to capture time periods of specific interest. For example, during the summer, dissolved oxygen can become critically low compared to other times of the year. Several deployments have been maintained for multiple years to understand year-to-year differences and observe trends.

Why Measure Continuously?

Continuous data are valuable for a variety of purposes including, but not limited to, characterizing baseline stream conditions, describing seasonal and diel (24-hour period) fluctuations, and documenting potential violations of water quality criteria. Continuous data can also be used in conjunction with other measurements to estimate loading or establish continuous data for parameters that are difficult to collect frequently. Most importantly, the operation of a continuous water quality monitor produces a record that can be processed and reported to the public.

Continuous Data Availability

Sensors that are used to measure water quality require meticulous field observation, cleaning, and calibration procedures. Additionally, the data require correction, grading, and final approval. All data available through WebPortal and included in the reports have completed these quality assurance procedures.

Reports of CIM data are available using the links at the bottom of the page. In addition to the continuous data, these reports often include other data collected during the deployment such as discrete chemistry grab samples and fish and macroinvertebrate community surveys.

To view or download continuous data, use WebPortal at the link below. Instructions on common tasks in WebPortal are also provided.

Go to WebPortal

WebPortal Instructions

Questions and comments can be directed to Mark Hoger at 717-783-7573 or mhoger@pa.gov

Reports

Basin	Stream Name	Tributary to	Site Location	County	Report
Chesapeake	Big Elk Creek	Elk River	Strickersville Rd	Chester	Report (HTML)
Delaware	Chester Creek	Delaware River	Goose Creek Park	Chester	Report (HTML)
Delaware	Chester Creek	Delaware River	Mosteller Park	Chester	Report (HTML)
Delaware	Chester Creek	Delaware River	Oakbourne Rd	Chester	Report (HTML)
Delaware	Chester Creek	Delaware River	Darlington Rd	Delaware	Report (HTML)
Delaware	Chester Creek	Delaware River	Dilworthtown Rd	Chester	Report (HTML)
Delaware	Cooks Creek	Delaware River	Red Bridge Rd	Bucks	Report (PDF)
Delaware	Forest Hills Run	Paradise Creek	UPS Carlton Rd	Monroe	Report (HTML)
Delaware	Forest Hills Run	Paradise Creek	DWS Carlton Rd	Monroe	Report (HTML)
Delaware	Forest Hills Run	Paradise Creek	Red Rock Rd	Monroe	Report (HTML)
Delaware	Forest Hills Run	Paradise Creek	Woodland Rd	Monroe	Report (HTML)
Delaware	Indian Creek	East Branch Perkiomen Creek	Route 63	Montgomery	Report (HTML)
Delaware	Indian Creek	East Branch Perkiomen Creek	Bergey Rd	Montgomery	Report (HTML)
Delaware	Pickering Creek	Schuylkill River	Route 29	Chester	Report (HTML)
Delaware	Red Clay Creek	White Clay Creek	Marshall Bridge Rd	Chester	Report (HTML)
Delaware	Saucon Creek	Lehigh River	Limeport Pike to Black River	Lehigh / Northampton	Report (PDF)
Delaware	Skippack Creek	Perkiomen Creek	Ridge Pike	Montgomery	Report (PDF)
Delaware	Skippack Creek	Perkiomen Creek	Route 63	Montgomery	Report (PDF)
Delaware	Skippack Creek	Perkiomen Creek	Route 63	Montgomery	Report (HTML)
Delaware	Tinicum Creek	Delaware River	Sheep Hole Rd	Bucks	Report (HTML)
Delaware	Tohickon Creek	Delaware River	South Park Rd to Stover Park Rd	Bucks	Report (PDF)
Delaware	Towamencin Creek	Skippack Creek	Metz Rd	Montgomery	Report (PDF)
Delaware	Towamencin Creek	Skippack Creek	Metz Rd	Montgomery	Report (HTML)
Delaware	West Branch Brandywine Creek	Brandywine Creek	Wagontown Rd	Chester	Report (HTML)
Delaware	West Branch Chester Creek	Chester Creek	Ivy Mills Rd	Delaware	Report (HTML)
Delaware	Wissahickon Creek	Schuylkill River	Route 73	Montgomery	Report (HTML)
Ohio	Blacklick Creek	Ohio River	Old Indiana Rd	Indiana	Report (PDF)
Ohio	Browns Run	Allegheny River	Browns Run Rd	Warren	Report (PDF)
Ohio	Clarion River	Allegheny River	Grant St (upstream of discharge)	Elk	Report (HTML)
Ohio	Clarion River	Allegheny River	Grant St (downstream of discharge)	Elk	Report (HTML)

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