Locations

SiteCountyStateRHI5RHI10RGI5RGI10Last measurement
Conowingo-Funks Pond Recreational AreaCecilMaryland142.44133.7714.1211.5811/12/2013
Constitution MarshPutnamNew York----04/14/2019
Cook FlatsJeffersonPennsylvania103.72-10.08-09/22/2006
Cooksburg Area-Private PropertyClarionPennsylvania123.42106.9711.228.3109/12/2008
Coolavin ParkFayetteKentucky----09/14/2014
Cooper CreekUnionGeorgia133.18-7.97-03/18/2013
Copicut WoodsBristolMassachusetts----03/16/2017
Corbin HillDutchessNew York----11/29/2018
Corcoran Environmental Study AreaAnne ArundelMaryland124.80119.7812.6110.9304/01/2010
Cornell Plantations/Beebe Lake WoodsTompkinsNew York129.70126.4111.8210.0611/08/2020
Corson's Brook WoodsRichmondNew York112.70107.967.503.7508/08/2016
Cosby Campground AreaCockeTennessee142.00-16.72-11/03/2004
Courson IslandWarrenPennsylvania115.5099.2211.439.7904/20/2010
Coweeta Hydrologic LaboratoryMaconNorth Carolina----08/14/2004
Craig - Douglas CemeteryMasonWest Virginia----01/26/2019
Cranesville - PlantationsPrestonWest Virginia88.40-4.93-08/15/2019
Craven Gap SouthBuncombeNorth Carolina125.90119.630.000.0003/03/2012
Crescent Moon Picnic AreaYavapaiArizona62.18-10.19-06/26/2014
Crull's IslandWarrenPennsylvania120.06110.6812.3210.6204/02/2009
Cub Lake TrailLarimerColorado60.24-4.64-06/17/2016
Cucumber GapSevierTennessee----04/13/2025
Cucumber-Tree, North CantonStarkOhio----04/28/2011
Cumberland Mountain State ParkCumberlandTennessee138.20128.129.838.1111/21/2024
Curtiss-Gale WMAOswegoNew York126.68121.8610.728.7605/21/2019
Curwensville Honey LocustsClearfieldPennsylvania----10/11/2007
Custer State ParkCusterSouth Dakota----06/15/1998
Cuyahoga Valley CompositeSummitOhio151.34142.7612.8210.7711/06/2011
Cuyahoga Valley National ParkSummitOhio----12/19/2018
Cylburn ArboretumBaltimore CityMaryland67.18-7.59-08/16/2015
Dakota DunesUnionSouth Dakota75.42-6.45-07/28/2013
DAR State ForestHampshireMassachusetts----02/06/2009
Dark Hollow ParkBucksPennsylvania114.08109.6213.0010.9508/08/2009
Daughmer Prairie Savannah State Nature PreserveCrawfordOhio----04/25/2016
Davey Woods Nature Preserve, OHLoganOhio131.18123.2810.929.2307/10/2009
David Crockett State ParkLawrenceTennessee137.16132.709.788.9511/18/2023
Davidson CreekHabershamGeorgia110.44-8.03-05/04/2003
Dead Horse Ranch State ParkYavapaiArizona----03/07/2012
Dead Mans PortageThunder Bay DistrictOntario----06/09/2014
Deep CreekSwainNorth Carolina145.46121.2512.409.5810/07/2006
Deer Creek State ParkPickawayOhio----05/14/2016
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