[dd, decimal degrees; ft, feet above the North American Vertical Datum of 1988; OB, bulk deposition from E or VWM; E, depth-integrated depth-integrated environmental; VWM, volume-weighted mean of two snowpack layers; ANC, acid neutralization capacity; ueq/L, microequivalents per liter; uS/cm, microsiemens per centimeter; SC, specific conductance at 25degC; pH values in standard units; H, hydrogen; Ca, calcium; Mg, magnesium; Na, sodium; K, potassium; NH4, ammonium; Cl, chloride; SO4, sulfate; NO3, nitrate; DOC, dissolved organic carbon; mg/L, milligrams per liter; SWE, snow-water equivalent; cm, centimeters; d34S, stable-sulfur isotope ratio (34S/32S); Hg, mercury; ng/L, nanograms per liter; NA or empty cell indicates not analyzed; <, below reporting limits; M, presence verified but not quantified; %, percent missing year indicates no sample collected or sample results reviewed and rejected Roth 1994: Mercury in water by CVAFD with potassium dichromate preservation USEPA Method 1631, Rev E: Mercury in water by Oxidation, Purge and Trap, and CVAFS] Station ID 483105114011200 Site Name APGAR LOOKOUT, MT Latitude (dd) 48.51805556 Longitude (dd) -114.02 Elevation (ft) 5179 SiteNumber StationName SampleDate WaterYear SampleType ANC (ueq/L) SC (uS/cm) pH H (ueq/L) Ca (ueq/L) Mg (ueq/L) Na (ueq/L) K (ueq/L) NH4 (ueq/L) Cl (ueq/L) SO4 (ueq/L) NO3 (ueq/L) DOC (mg/L) Total N (mg/L) Total Dissolved N (mg/L) Hg (ng/L) Roth 1994 Hg (ng/L) USEPA 1631 d34S (per mil) SWE (cm) Snow Depth (cm) Ionic Balance (%) 483105114011200 APGAR LOOKOUT, MT 1996-03-19 1996 OB -6 3 5.2 6.3 <3.1 <1.7 4.3 3.8 1.9 <1.1 2.5 5.2 1.1 160 35.8 483105114011200 APGAR LOOKOUT, MT 1997-04-04 1997 OB -8 4 5 10 <3.1 <1.7 1 2.3 1.4 5.2 4.9 1.1 6.6 254 7.3 483105114011200 APGAR LOOKOUT, MT 1998-03-05 1998 OB -11 5 5 10 <3.1 <1.7 <0.5 6 1.4 6 6.9 0.7 6.3 145 5.6 483105114011200 APGAR LOOKOUT, MT 1999-03-25 1999 OB -6.6 3 5.3 5 <3.1 <1.7 2.2 0.5 5.4 1.4 4.6 5.2 0.4 5.9 64 183 7.8 483105114011200 APGAR LOOKOUT, MT 2000-03-06 2000 OB -5.4 4 5.1 7.9 <3.1 <1.7 <0.9 <0.5 4.4 <1.1 4.8 6.1 0.4 7.3 180 6 483105114011200 APGAR LOOKOUT, MT 2002-03-04 2002 OB -9.8 4 5.2 6.3 <3.1 <1.7 <0.9 <0.5 5.4 <1.1 3.3 7.1 0.6 1 142 5.9 483105114011200 APGAR LOOKOUT, MT 2003-03-12 2003 OB -8 6 5 10 <3.1 <1.7 1.3 <0.5 6.9 1.1 4.4 7.1 0.5 1.3 50 173 18.2 483105114011200 APGAR LOOKOUT, MT 2004-03-09 2004 OB -10.2 5 5.1 7.9 <3.1 <1.7 1.3 <0.5 5 2 4.2 7.9 0.6 1.7 61 178 0.4 483105114011200 APGAR LOOKOUT, MT 2006-03-10 2006 OB -4.4 4.1 5.4 4 <0.5 <0.2 1.7 <0.5 5.3 1.7 3.5 5.7 0.43 64 183 0.5 483105114011200 APGAR LOOKOUT, MT 2007-03-13 2007 OB -4.4 4.7 5.2 6.3 4 0.8 1.3 0.8 4.7 1.4 4 6.4 0.35 59 152 20.5 483105114011200 APGAR LOOKOUT, MT 2008-04-13 2008 OB -2.8 4.5 5.3 5 4.5 0.8 1.7 0.5 6.3 1.4 4.4 5.7 0.35 73 208 24.1 483105114011200 APGAR LOOKOUT, MT 2009-03-18 2009 OB -3.2 3.8 5.5 3.2 3 0.8 <0.9 0.5 3.2 0.6 2.5 5 0.81 3.07 57 170 13.8 483105114011200 APGAR LOOKOUT, MT 2010-03-15 2010 OB -5 4.4 5.2 6.3 2.5 0.8 <0.9 0.5 6.3 0.6 3.1 6.4 0.45 2.16 52 165 23.8 483105114011200 APGAR LOOKOUT, MT 2011-03-14 2011 OB -9.6 4.1 5.2 6.3 2 0.8 1.3 <0.5 4.5 <0.6 3.5 5.7 0.44 1.48 69 259 23.7 483105114011200 APGAR LOOKOUT, MT 2012-03-12 2012 OB -4 3 4.9 12.6 3 <1.6 2.2 <0.5 6 2.3 4 5.4 0.4 0.16 2.13 63 218 34.1 483105114011200 APGAR LOOKOUT, MT 2013-03-04 2013 OB 0 3 5.1 7.9 2.5 <1.6 1.3 0.5 6.4 1.7 2.9 5.7 0.5 0.17 1.5 53 185 28.7 483105114011200 APGAR LOOKOUT, MT 2014-03-13 2014 OB 1.2 3 5.8 1.6 2 <0.8 1.3 <0.3 5.4 0.8 2.9 4.3 0.32 0.14 0.15 66 198 17.9 483105114011200 APGAR LOOKOUT, MT 2015-03-20 2015 OB 41 81 483105114011200 APGAR LOOKOUT, MT 2016-03-02 2016 OB -2.2 2.1 5.4 4 0.5 <0.2 0.9 0.3 2.9 0.6 1 2.9 <0.2 0.1 0.74 41 112 31.3