Whitefish Area Water Quality Map


2013 WAPOA Water Quality Map

CLICK HERE for the map

Two smaller, simpler maps of year-old 2012 map with 2011 data just below:

color map  CLICK HERE

black/white map CLICK HERE


Previous maps



 Map Facts

These maps were updated in 2013 to show the most recent full-season water quality measurements.

Good quality lake water is at the core of WAPOA's efforts.

To know what water quality is, you have to take water samples and test the water.  WAPOA volunteers have been doing that for many years on over 30 lakes.

The result is a TSI number.  The TSI number combines measurements of water clearness (visibility), amount of phosphorus, and chlorophyll-a.

The TSI number closely correlates with the amount of algae growing in the water.

A higher TSI (unfavorable) means more algae in the water.

Water with a high TSI may be unsuitable for swimming, clogged with plants, and supportive of rough fish.

For every 1 point increase in the TSI, there is a 10% increase in algae in the water.

How we can help: Algae and other plants need phosphorus to grow.

Keep phosphorus out of water by preventing run-off of driveway sediment and chemicals, by not using fertilizer with phosphorus, by maintaining septic systems, and by not mowing your lakeside lawn right up to the waters edge. Let the vegetation at water's edge grow up to form a protective barrier.