WATER QUALITY

The EPA maintains data on the attainment of water quality for the nation's watersheds - the area drained by water bodies such as rivers, streams, lakes, estuaries and coastal waters.

The % Good column in the table below is the percentage of the retirement city's watershed that "Fully Supports" its designated use as public water supply, agricultural, recreational, industrial or other use.

Aspen and Key West rank highest in this criteria because 100% of its watersheds fully support the designated use.

Water Quality
2002 - 2010

		%	%	%	GPTR
City/Town	Watershed(s)	Good	Threatened	Impaired	Rank
Aspen, CO	Roaring Fork	100%	0%	0%	1
Key West, FL	Florida Bay-Florida Keys	100%	0%	0%	1
Vail, CO	Eagle	98%	0%	2%	3
San Marcos, TX	San Marcos	89%	0%	11%	4
Bigfork, MT	South Fork Flathead and Swan	70%	19%	12%	5
Gatlinburg, TN	Lower French Broad	88%	0%	12%	5
Georgetown, TX	San Gabriel	88%	0%	12%	5
Provo, UT	Provo	75%	0%	26%	8
Hot Springs Village, AR	Upper Saline and Fourche La Fave	72%	1%	27%	9
Portland, ME	Presumpscot	71%	0%	29%	10
The Woodlands, TX	Spring and West Fork San Jacinto	71%	0%	29%	10
Tyler, TX	Upper Neches	71%	0%	29%	10
Iowa City, IA	Lower Iowa	18%	51%	31%	13
Prescott, AZ	Big Chino-Williamson Valley, Upper Verde and Hassayampa	68%	0%	32%	14
Clarksville, TN	Lower Cumberland	66%	0%	34%	15
Palm Springs, CA	Southern Mojave and Salton Sea	47%	20%	34%	15
GPTR Rank - Lower "% Impaired" is better

% Good = Percent of the watershed that Fully Supports all of its designated uses
% Threatened = Percent of the watershed that currently Fully Supports all of its designates uses
but may become impaired in the future if pollution control actions are not taken
% Impaired = Percent of the watershed that cannot Fully Support one or more of its designated
uses

WATER QUALITY

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