Adirondack Long Term Monitoring Program (ALTM)

The Adirondack region of northern New York State is located directly downwind from major midwest coal-burning sources. Power generating facilities in the Midwest emit sulfur dioxide and nitrogen oxides, which are the major precursors of acid rain causing the acidification of many Adirondack lakes and ponds. Certain geologic and soil characteristics including elevated terrain, thin shallow soils and impermeable bedrock combined with high amounts of rainfall make this region one of the most sensitive to acidification in North America. Consequently, this region is a focal point for numerous scientific research efforts designed to identify the processes involved in acidification and to evaluate its effect on aquatic resources as well as the effectiveness of emissions controls.

The results of research conducted by the Adirondack Lakes Survey Corporation (ALSC) from 1984-1987 indicated that nearly twenty five percent of the waters had pH values of 5.0 or less and that forty eight percent of the waters had little or no buffering capacity ANC≤40µeq/L) or were extremely sensitive to further acidification. In 1992, following the enactment of the Clean Air Act Amendments of 1990, the ALSC initiated a long-term chemical monitoring project involving 52 waters representative of the different classes of waters found in the Adirondack region.

This Long-Term Monitoring Program is currently being sponsored by the New York State Energy Research Development Authority (NYSERDA), NYSDEC and the USEPA. This unique network of support allows this critical long-term record to continue uninterrupted.

Current ALTM data:

NEW! 1992 – 2014 ALTM Chemistry zip archive

1999 – 2012 ALTM Snowpack Chemistryzip archive

NEW! 2013 Whiteface Cloud Chemistry and Meteorological Data zip archive

NEW! Buck Creek and Bald Mountain Brook Data

2012 Whiteface Cloud Chemistry and Meteorological Data zip archive

1993 – 2012 ALTM Weekly Spring Melt Chemistry zip archive

1984-87 ALS Summer Surface Water Chemistry zip archive

ALTM Sample location coordinates zip archive

Updated!  1992 thru 2012 Detection Limits

For additonal information pertaining to the posted data, or other ALTM data, please email us at: d a t a @ a d i r o n d a c k l a k e s s u r v e y . o r g

Click to view ALTM Sample locations in Google maps