Data collected by NRWA volunteers reflects a snapshot of conditions on one particular day at each individual sampling site. While that data is useful in studying the general health of the rivers and watching for quality issues, daily conditions of the rivers are variable and may be affected by a number of factors; therefore, the data may not represent the actual conditions of the rivers in other locations or on other occasions. If you have questions about water quality, you are encouraged to contact water quality personnel at the NRWA.

Thanks to grants from the Greater Lowell Community Foundation, the Nashua River Watershed Association organized ten years of our water quality monitoring data (1996-2005) into an accessible and usable format necessary for analyzing trends. An additional enhancement was added in 2006 to color-code data by parameter to make a report card of stream conditions. Data from each year since can be viewed in the same report card format. The following reports are available:

2009 Water Quality Data (Excel)

2008 Water Quality Data (Excel)

2007 Water Quality Data (Excel)

2007 Color-coded E.Coli Data (Excel)

2007 Lancaster Nutrient Data (Excel)

2006 Water Quality Data (Excel)

Reports from 1996 to 2005:

All Monitoring Sites 1996 to 2005 (PDF)

Data by Site 1996-2005 (PDF)

Data by Year 1996-2005 (PDF)

Data by Parameter 1998-2005 (PDF)

Color-Coded Data by Parameter 1996-2005 (Excel 2.8 MB)

Color-Coded Data by Parameter 1996-2005 (HTML 14 KB)

All Sites Descriptions 1996-2005 (Excel)

The following reports are also available:

2005 Water Quality Data (Excel)

2004 Water Quality Reports (HTML)

2003 Water Quality Report (PDF)

2002 Water Quality Reports (HTML)

2001 Water Quality Reports (HTML)

For more information about water quality monitoring, please contact Kathryn Nelson, NRWA's Water Quality Monitoring Coordinator, (email Kathryn) or Martha Morgan, NRWA's Water Resources Advisor, (email Martha).

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