WATER QUALITY SUMMARY

COFFEE POND, CASCO

MIDAS: 3390, Sample Station # 1

The Maine Department of Environmental Protection (ME-DEP) and the Volunteer Lake Monitoring Program (VLMP) have collaborated in the collection of lake data to evaluate water quality, track algal blooms, and determine water quality trends. This dataset does not include bacteria, mercury, or nutrients other than phosphorus.

Water quality monitoring datasets for Coffee Pond have been collected since 1974. During this period, 9 years of basic chemical information were collected in addition to Secchi Disk Transparencies (SDT). In summary, the water quality of Coffee Pond is considered above average, based on measures of SDT, total phosphorus (TP), and Chlorophyll-a (Chla). The potential for nuisance algal blooms on Coffee Pond is very low.

Water Quality Measures: Coffee Pond is a non-colored lake (average color 11 SPU) with an average SDT of 8.5 m (28 ft). The range of water column TP for Coffee Pond is 4 - 8 parts per billion (ppb) with an average of 6 ppb. Chla ranges from 0.6 - 4.5 ppb with an average of 1.0 ppb. Late season dissolved oxygen (DO) profiles show slight to moderate DO depletion in deep areas of the lake. The potential for phosphorus to leave the bottom sediments and become available to algae in the water column (internal loading) is low to moderate.

Coffee Pond is sampled in conjunction with Lakes Environmental Association (LEA) located in Bridgton Maine.

See the Maine DEP Explanation of Lake Water Quality Monitoring Report for measured variable explanations. Additional lake information can be obtained by contacting Maine DEP at 207-287-3901 or VLMP at 207-783-7733, and at these Websites: http://www.lakesofmaine.org and http://www.maine.gov/dep/water/lakes/index.html and http://www.mainevolunteerlakemonitors.org .

Filename: COFF3390, Revised: 12/04, By jm, 1/11,by jp