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	USDA Forest Service 1400 Independence Avenue SW Washington, D.C. 20250-0003 (202) 205-8333

White Mountain Wilderness

General Information

State(s): New Mexico

County(s): Lincoln

Forest Service Administrative Unit(s):
Southwest Region (Region 3) -- Lincoln National Forest

Size: 48266 acres

Elevation Range: 6,000 - 11,580 feet

Image(s): http://www.wilderness.net/images/

Detailed wilderness information: http://www.wilderness.net

GIS Map/Official Boundary: http://www.wilderness.net/NWPS/

Webcam(s): White Mountain (Gallery)

Data:

Wet Deposition (NADP)
- Guadalupe Mountains National Park
- Mayhill
Visibility (IMPROVE) - White Mountain

Links

HOME
White Mountain Wilderness
Map
Alphabetical Area Listing

Resource Concern Thresholds

AQRV Type: VISIBILITY
Sensitive Receptor	Sensitive Receptor Indicator	Thresholds
Natural Visibilty		In specific Class I areas to maintain consistency with Regional Haze implementation plans or BART, the visibility threshold for concern is not exceeded if the 98th %ile change in light extinction is <5% for each year modeled, when compared to the 20% best natural background values.
Natural Visibilty		For sources generally further than 50 km from a Class I area, the visibility threshold for concern is not exceeded if the 98th %ile change in light extinction is <5% for each year modeled, when compared to the annual average natural condition value for that Class I area.
Plume Blight	Absolute Contrast	For near field sources (within 50 km of a Class I area), no additional analysis will be requested If screening analysis of a new or modified source can demonstrate that its emissions will not cause a plume with hourly estimates of DeltaE (color difference index) greater than or equal to 2.0 or the absolute value of the contrast greater than or equal to 0.05 when modeled against natural conditions.
Plume Blight	Absolute Contrast	Higher level near-field screening and refined analysis: no further analysis will likely be requested if a new or modified source can show that impacts from a new or modified source will stay with the threshold of DeltaE <1.0 and \|C\| <0.02 modeled against natural conditions.
Plume Blight	Color Difference Index	Plume blight near-field refined analysis: no further analysis will likely be requested if a new or modified source can show that impacts from a new or modified source will stay with the threshold of DeltaE <1.0 and \|C\| <0.02 when modeled against natural conditions.
Plume Blight	Color Difference Index	For near field sources (within 50 km of a Class I area), no additional analysis will be requested If screening analysis of a new or modified source can demonstrate that its emissions will not cause a plume with hourly estimates of DeltaE (color difference index) greater than or equal to 2.0 or the absolute value of the contrast greater than or equal to 0.05 when modeled against natural conditions.

AQRV Type: WATER
Sensitive Receptor	Sensitive Receptor Indicator	Thresholds
Headwater Systems	Aluminum	No more than a 10% increase in aluminum in headwater systems is acceptable.
Headwater Systems	Anions	No more than a 10% change in anions in headwater systems is acceptable.
Headwater Systems	Calcium	No more than a 10% change in calcium in headwater systems is acceptable.
Headwater Systems	Cations	No more than a 10% change in cations in headwater systems is acceptable.
Headwater Systems	Chloride	No more than a 10% change in chloride in headwater systems is acceptable.
Headwater Systems	Conductivity	No more than a 10% change in conductivity in headwater systems is acceptable.
Headwater Systems	Nitrate	No more than a 10% increase in nitrates in headwater systems is acceptable.
Headwater Systems	Sulfate	No more than a 10% increase in sulfates in headwater systems is acceptable.
Headwater Systems	pH	No more than a 10% change in the pH of headwater systems is acceptable.
Perennial Streams	Anions	No more than a 10% change in anions in perennial streams is acceptable.
Perennial Streams	Cations	No more than a 10% change in cations in perennial streams is acceptable.
Perennial Streams	Conductivity	No more than a 10% change in conductivity in perennial streams is acceptable.
Perennial Streams	pH	No more than a 10% change in the pH of perennial streams is acceptable.
Perennial Waters	Aluminum	No more than a 10% increase in aluminum in perennial waters is acceptable.
Perennial Waters	Anions	No more than a 10% change in anions in perennial waters is acceptable.
Perennial Waters	Calcium	No more than a 10% change in calcium in perennial waters is acceptable.
Perennial Waters	Cations	No more than a 10% change in cations in perennial waters is acceptable.
Perennial Waters	Chloride	No more than a 10% change in chloride in perennial waters is acceptable.
Perennial Waters	Conductivity	No more than a 10% change in conductivity in perennial waters is acceptable.
Perennial Waters	Nitrate	No more than a 10% increase in nitrates in perennial waters is acceptable.
Perennial Waters	Sulfate	No more than a 10% increase in sulfates in perennial waters is acceptable.
Perennial Waters	pH	No more than a 10% change in the pH of perennial waters is acceptable.
Water Quality	Regulated Constituents	For water quality, no more than a 10% change in regulated constituents is acceptable.

Pollutant Exposure Concern Thresholds

Pollutant Exposures	Level Name	Thresholds
Nitrogen	EXCEEDANCE	The Deposition Analysis Threshold for nitrogen deposition below which estimated impacts from a source are considered negligible is 0.005 kg/ha/yr. kilograms/hectare/year.
Q (Sum of SO2+NOx+PM10+H2SO4)	QOverD	For new or modified sources locating greater than 50 km from a Class I area, its impacts will be considered negligible with respect to Class I AQRVs if its total SO2, NOx, PM10, and H2SO4 annual emissions in tons/yr, based on 24-hr maximum allowable emissions, divided by the distance (km ) from the Class I area (Q/D) is 10 or less. For sources operating less than a year, the emissions must be adjusted to reflect what the emissions would be if the source operated year-round.
Sulfur	EXCEEDANCE	The Deposition Analysis Threshold for sulfur deposition below which estimated impacts from a source are considered negligible is 0.005 kg/ha/yr.
	CHANGE	Higher level near-field screening and refined analysis: no further analysis will likely be requested if a new or modified source can show that impacts from a new or modified source will stay with the threshold of DeltaE <1.0 and \|C\| <0.02 modeled against natural conditions.
	EXCEEDANCE	For near field sources (within 50 km of a Class I area), no additional analysis will be requested If screening analysis of a new or modified source can demonstrate that its emissions will not cause a plume with hourly estimates of DeltaE (color difference index) greater than or equal to 2.0 or the absolute value of the contrast greater than or equal to 0.05 when modeled against natural conditions.
	CHANGE	For near field sources (within 50 km of a Class I area), no additional analysis will be requested If screening analysis of a new or modified source can demonstrate that its emissions will not cause a plume with hourly estimates of DeltaE (color difference index) greater than or equal to 2.0 or the absolute value of the contrast greater than or equal to 0.05 when modeled against natural conditions.
	CHANGE	Plume blight near-field refined analysis: no further analysis will likely be requested if a new or modified source can show that impacts from a new or modified source will stay with the threshold of DeltaE <1.0 and \|C\| <0.02 when modeled against natural conditions.
	EXTINCTION	For sources generally further than 50 km from a Class I area, the visibility threshold for concern is not exceeded if the 98th %ile change in light extinction is <5% for each year modeled, when compared to the annual average natural condition value for that Class I area.
	EXTINCTION	In specific Class I areas to maintain consistency with Regional Haze implementation plans or BART, the visibility threshold for concern is not exceeded if the 98th %ile change in light extinction is <5% for each year modeled, when compared to the 20% best natural background values.

Natural Background Visibility

Site Specific Rayleigh scattering coefficient: 9	Clearest 20% Natural	Clearest 20% 2000-2004 Baseline	Haziest 20% Natural	Haziest 20% 2000-2004 Baseline	Average Annual Natural	Annual Average 2000-2004 Baseline
Standard Visual Range (km)	335	256	189	97	262	163
Haze Index (dv)	0.66	3.55	6.8	13.7	3.31	8.33
For more information on these numbers, click here.