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

Site 44 - East Branch Croton River near Croton Falls - EBCCROTN - IMAGE Gallery Watershed Characteristics - Nutrient Chemistry - Molecular Tracers - Macroinvertebrates

Watershed Land Use/Land Cover Characteristics - Data Methodology Description Latitude(dd): 41.355717 Longitude(dd): -73.658092 Watershed Area: 238.3 km2 ------------------------------------------------------------------------------------------------ East of Hudson Land Use/Cover Map Impervious Agriculture Forest Water Wetland 10.20% 10.14% 75.13% 4.05% 8.23% -------------------------------------------------------------------------------------------------   1990 2000 Total Population 28813 35131 Population Density (ind./km2) 120.92 147.44 -------------------------------------------------------------------------------------------------   2000 2001 2002 # of SPDES Dischargers 19 18 18 Total Annual Volume (normalized for watershed area) 0.28 cm 0.27 cm 0.28 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 22AUG00 0.8183 22AUG00 0.8183 2001 22AUG01 0.4919 23AUG01 0.4919 2002 30JUL02 0.2752 14AUG02 0.2752 Data Table - Methodology   2000 QUAL 2001 QUAL 2002 QUAL pH 8.2   7.9   7.7   ALKL 75   78   80   COND 298   329   327   CA 26   .   .   MG 8.7   8.7   8.8   NA 21   25   23   K 2   2.4   2.4   CL 39   49   45   SO4 13   10   12   NH4N 0.03   0.06   0.09   NO3N 0.2   0.2   0.4   ORGN 0.3   0.3   0.3   SKN 0.3   0.4   0.4   TKN 0.4   0.5   0.5   SRP 0.017   0.007   0.014   TDP 0.02   0.012   0.02   TP 0.03   0.04   0.04   DOC 4842   4443   5687   BDOC .   536   873   TSS 36   5   5.2   TSS05 33   4.2   5   TSS10 1.9   0.7   0.5   TSS20 0.6   1.3   0.5   VSS 13   1.9   1.9   VSS05 12   1.2   1.7   VSS10 0.6   0.2   0.1   VSS20 0.2   0.6   0.2     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 0.9926 2001 23AUG01 0.4237 --- --- 2002 29JUL02 0.3947 --- --- 2003     --- --- Data Table - Methodology   2000(SB) QUAL 2001(WB) QUAL 2001(SB) QUAL 2002(WB) QUAL 2002(SB) QUAL 2003(WB) QUAL FLU 0.004 HE .   0.005 HE .   0.007 E .   PHE 0.014   .   0.013 HE .   0.019   .   ANT 0.009 HE .   0.005 HE .   0.005 E .   2MP 0.005 HE .   0.014 HE .   0.009 E .   1MP 0.0017 HE .   0.002 HE .   0.005 E .   FLR 0.02   .   0.02 HE .   0.03   .   PYR 0.015   .   0.017 HE .   0.02 E .   BAA 0.012 HE .   0.006 HE .   0.01   .   CHR 0.006 HE .   0.008 HE .   0.011 E .   BBF 0.009   .   0.008 HE .   0.014 E .   BKF 0.005 HE .   0.007 HE .   0.012   .   BAP 0.009   .   0.008 HE .   0.011   .   HHCB 0.008   .   0.009 HE .   0.014   .   AHTN 0.01 HE .   0.02 HE .   0.016   .   CAF 0.04 HE .   0.012 HE .   0.06   .   bCOP 0.019 HE .   0.02   .   0.04   .   EPI 0.02 HE .   0.006   .   0.02   .   CHO 1 HE .   0.8   .   1.2   .   aCOP 0.1 HE .   0.09   .   0.1   .   aONE 0.03 HE .   0.017   .   0.04 E .   bONE 0.04 HE .   0.05   .   0.1   .   SNOL 0.06 HE .   0.2   .   0.1   .     Benthic Macroinvertebrates - Methodology Water Quality Score - WQS Definition