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Penobscot River
A mathematical computer model to predict water quality of the Penobscot River as affected by point and non-point sources was developed in June 2000 based on data collected in 1997. Additional data collected in 2001 and combined with the 1997 data formed the basis for a draft revision of the model in 2003. Since then, there have been some significant reductions in discharges to the river, prompting collection of additional data in 2007. All of these events are reported below and will be used by DEP to finalize the 2003 model, which will be the basis for renewal of MPDES permits with effluent limits necessary to ensure attainment of Water Quality Standards for the Penobscot River.
Penobscot River 2007 Data Report. July 2008
DRAFT Penobscot River Modeling Report. April 2003
Penobscot River 2001 Data Report. May 2002
Penobscot River 2000 Modeling Report, Final, June 2000
Penobscot and Piscataquis River Data Reports
Data reports are available for the summer of 1997 sampling of the Penobscot and Piscataquis Rivers. For the Penobscot project, 103 miles of river were covered from Millinocket to Bucksport. The Piscataquis project covered 23 miles of river from Guilford to Milo. Parameters sampled included dissolved oxygen, temperature, nutrients, chlorophyll a, secchi depth, and ultimate BOD. The sampling was undertaken to check compliance with dissolved oxygen standards specified by water quality classification and for calibrating a water quality model. Further information on these reports.
Piscataquis River Data Report. 2001 Survey. January 2002
2002 Piscataquis River Data Report. This report presents the data from a water quality survey made on the Piscataquis River between Guilford and Milo during the summer of 2001.
