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Water Quality Monitoring in the Source Water Areas for NYC PHASE I Monitoring Sites

Site 36 - West Branch Croton River near Allen Corners - WBCALLEN - IMAGE Gallery Watershed Characteristics - Nutrient Chemistry - Molecular Tracers - Macroinvertebrates

Watershed Land Use/Land Cover Characteristics - Data Methodology Description Latitude(dd): 41.471733 Longitude(dd): -73.760774 Watershed Area: 28.3 km2 ------------------------------------------------------------------------------------------------ East of Hudson Land Use/Cover Map Impervious Agriculture Forest Water Wetland 0.86% 2.17% 89.90% 4.56% 11.07% -------------------------------------------------------------------------------------------------   1990 2000 Total Population 987 995 Population Density (ind./km2) 34.81 35.09 -------------------------------------------------------------------------------------------------   2000 2001 2002 # of SPDES Dischargers 0 0 0 Total Annual Volume (normalized for watershed area) 0.00 cm 0.00 cm 0.00 cm Ions, Nutrients, DOC/BDOC, and Particulates - click here for abbreviations/units Sampling Dates and Discharge (Q) - Realtime Flow Monitoring   Ions/Nutr & DOC/BDOC Organic Particles Date Q - m3/s Date Q - m3/s 2000 21AUG00 0.1181 21AUG00 0.1181 2001 21AUG01 0.0641 21AUG01 0.0641 2002 31JUL02 0.0238 31JUL02 0.0238 Data Table - Methodology   2000 QUAL 2001 QUAL 2002 QUAL pH 8   7.5   7.5   ALKL 35   35   36   COND 192   233   224   CA 12   .   .   MG 3.9   3.7   4.2   NA 19   27   23   K 0.8   0.9   0.7   CL 32   46   40   SO4 12   7.2   9.2   NH4N 0.005 B 0.008 B 0.011   NO3N 0.03   0.04   0.04   ORGN 0.3   0.3   0.2   SKN 0.3   0.3   0.2   TKN 0.3   0.3   0.3   SRP 0.002 B 0.002 B 0.002 B TDP 0.005 B 0.005 B 0.005 B TP 0.011   0.008 B 0.01   DOC 7212   5444   5788   BDOC .   203   460   TSS 28   0.9 B 1.5   TSS05 27   0.7   1.3   TSS10 1.5   0.2 B 0.1 B TSS20 0.2   0.4   0.2 B VSS 7.8   0.4   0.6   VSS05 7.4   0.3 B 0.3 B VSS10 0.3   0.06 B 0.06 B VSS20 0.08   0.1 B 0.09 B   Molecular Tracer Analysis - click here for abbreviations/units Sampling Dates and Discharges (Q) - Realtime Flow Monitoring   Summer Baseflow Winter Baseflow Date Q - m3/s Date Q - m3/s 2000 21AUG00 0.1181 2001 23AUG00 0.0504 --- --- 2002 29JUL02 0.0470 --- --- 2003     --- --- Data Table - Methodology   2000(SB) QUAL 2001(WB) QUAL 2001(SB) QUAL 2002(WB) QUAL 2002(SB) QUAL 2003(WB) QUAL FLU 0.0006 HE .   0.0005 E .   0.0017 E .   PHE 0 NE .   0.0014 E .   0.003 E .   ANT 0 NE .   0.00014 E .   0.003 E .   2MP 0 NE .   0.0006 E .   0.006 E .   1MP 0 NE .   0.0003 E .   0.006 E .   FLR 0 NE .   0.0005 E .   0.012 E .   PYR 0 NE .   0.00019 E .   0.009 E .   BAA 0 NE .   0.0003 E .   0.0014 E .   CHR 0 NE .   0.00014 E .   0.0019 E .   BBF 0 NE .   0.00003 E .   0.012 E .   BKF 0 NE .   0.00002 E .   0.011   .   BAP 0 NE .   0.00002 E .   0.0013 E .   HHCB 0.003 HE .   0.0014 E .   0.011   .   AHTN 0 NE .   0.003 E .   0.012 E .   CAF 0 NE .   0.0013 E .   0.019   .   bCOP 0.01 HE .   0.005 E .   0.03   .   EPI 0 NE .   0.0014 E .   0.02   .   CHO 0.4 HE .   0.4   .   0.4   .   aCOP 0.07 HE .   0.08   .   0.09   .   aONE 0.03 HE .   0.016   .   0.05   .   bONE 0.08 HE .   0.007   .   0.08   .   SNOL 0.06 HE .   0.03   .   0.08 E .     Benthic Macroinvertebrates - Methodology Water Quality Score - WQS Definition