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San Marcos Environment Facts

Air Quality, Water Quality, Climate and more


San Marcos
Air Quality
Travis County
. Good Days Moderate Days Unhealthy for Sensitive Persons Days Unhealthy Days Very Unhealthy Days
2017 262 99 4 0 0
2016 280 85 1 0 0
2015 239 116 10 0 0
2014 262 103 0 0 0
2013 269 95 1 0 0




San Marcos
Water Quality
San Marcos Watershed
. % Good % Threatened % Impaired
2014 na na na
2012 na na na
2010 76 0 24
2008 88 0 12
2006 95 0 5
2004 87 0 13
2002 100 0 0




San Marcos
Recreation
. # of Parks # of Parks
(99 City Avg)
National Parks, Historic Sites, etc.
(managed by National Park Service)
Lyndon B. Johnson National Historical Park and San Antonio Missions National Historical Park 7
National Campgrounds, Lodges, etc.
(other federal agency-managed sites)
11 26
State Parks, Sites, etc. 10 11



San Marcos Climate
(1971-2000)
. . 99 City Avg
January - Avg Low Temp 39 F 27 F
January - Avg Daily Temp 50 F 37 F
July - Avg Daily Temp 84 F 74 F
July - Avg High Temp 95 F 86 F
Avg Annual Precipitation 37 in 35 in



San Marcos Elevation
612 feet GPTR 99 City Average
1,652 feet



San Marcos
Natural Hazards
. Risk Level 99 City Average
Total Hazard Risk Moderate Moderate
Earthquake 0% 10.9%
Tsunami No Risk No Risk
Hurricane 20-40 10
Flood Very High Very High
Tornado Low Low
Volcano No Risk No Risk
Wildfire High Low



San Marcos
Man-Made Hazards (Nuclear)
Nuclear Power Stations
(# Reactors)
Distance from City GPTR 99 City
Average
South Texas (2) 130 miles 50% of cities are within 100 miles of at least one nuclear station



San Marcos
Heating and Cooling Degree Days
(avg annual)
. . 99 City Avg
Total Degree Days 4,542 5,915
HDD 1,629 4,662
CDD 2,913 1,253



EPA Hazardous Material Cleanup Sites
(San Marcos Area)
San Marcos Area EPA Cleanup Sites


Legend:
Small green circles (older style maps) or multi-colored circles (newer style maps: click here for legend) indicate 1)Superfund Sites 2)Federal Facilities 3)RCRA Corrective Action Sites and 4)Brownfields Properties (EPA hazardous material cleanup sites defined at Environment link)

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