Return to EOH Site Map

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

Site 58 - Tributary of Croton River near Lake Purdy - CROUTRB2 - IMAGE Gallery Watershed Characteristics - Nutrient Chemistry - Molecular Tracers - Macroinvertebrates

Watershed Land Use/Land Cover Characteristics - Data Methodology Description Latitude(dd): 41.326199 Longitude(dd): -73.693261 Watershed Area: 5.4 km2 ------------------------------------------------------------------------------------------------ East of Hudson Land Use/Cover Map Impervious Agriculture Forest Water Wetland 22.45% 9.56% 67.62% 0.37% 4.93% -------------------------------------------------------------------------------------------------   1990 2000 Total Population 2118 2517 Population Density (ind./km2) 391.41 465.04 -------------------------------------------------------------------------------------------------   2000 2001 2002 # of SPDES Dischargers 1 1 1 Total Annual Volume (normalized for watershed area) 6.01 cm 6.02 cm 6.28 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 12SEP00 0.0091 12SEP00 0.0091 2001 05SEP01 0.0051 05SEP01 0.0051 2002 30JUL02 0.0063 30JUL02 0.0063 Data Table - Methodology   2000 QUAL 2001 QUAL 2002 QUAL pH 7.6   7.8   7.4   ALKL 80   103   78   COND 763   869   674   CA 56   .   .   MG 16   19   14   NA 65   70   53   K 20   20   14   CL 131   159   113   SO4 70   60   44   NH4N 0.08   0.02   0.1   NO3N 8.9   4.5   3.6   ORGN 0.7   0.6   0.5   SKN 0.7   0.6   0.6   TKN 0.9   0.8   0.9   SRP 0.1   0.2   0.1   TDP 0.1   0.2   0.1   TP 0.1   0.2   0.1   DOC 4442   4277   5339   BDOC .   592   671   TSS 1.2 B 1.2 B 3.3   TSS05 0.8 B 0.8   2.2   TSS10 0.09 B 0.3   0.4   TSS20 0.2   0.4   0.6   VSS 0.5   0.5   1   VSS05 0.4   0.5   0.9   VSS10 0.008 B 0.09   0.1   VSS20 0.05   0.2   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 12SEP00 0.0091 2001 05DEP01 0.0051 07MAR01 0.1163 2002 29JUL02 0.0090 21FEB02 0.0306 2003     11FEB03 . 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 0.009 E 0.0017 HE 0.018   0.007 E 0.016   PHE 0.004 NHE 0.05   0.012 HE 0.1   0.04 E 0.04 E ANT 0.0011 NHE 0.0019 E 0.006 HE 0.1   0.002 E 0.01 E 2MP 0.003 NHE 0.03   0.0017 HE 0 NE 0.003 E 0.013 E 1MP 0.0012 NHE 0.017   0.0018 HE 0 NE 0.003 E 0.01 E FLR 0.006 HE 0.07   0.015 HE 0.2   0.06   0.04   PYR 0.0008 NHE 0.05   0.008 HE 0.1   0.03 E 0.02 E BAA 0.004 HE 0.007 E 0.001 HE 0.017   0.009 E 0.011   CHR 0.0012 NHE 0.018 E 0.003 HE 0.08   0.019   0.015 E BBF 0.0009 NHE 0.017   0.003 HE 0.08   0.017   0.02   BKF 0.0006 NHE 0.012   0.0017 HE 0.06   0.015   0.016   BAP 0.0004 NHE 0.006   0.0019 HE 0.04   0.009 E 0.017   HHCB 0.6 HE 0.2   1.2   0.4   0.3   0.4   AHTN 0.3 HE 0.09   0.5   0.1   0.1   0.1   CAF 0.2   0.05   0.019   0.008 E 0.1   0.2 E bCOP 0.1 HE 0.4   0.08   0.1   0.09   0.2   EPI 0.014 HE 0.016   0.004   0.007   0.016   0.04 E CHO 0.4   1   0.5   0.7   1.1   0.9   aCOP 0.08   0.7   0.07   0.3   0.2   0.2   aONE 0.01 HE 0.04   0.03 HE 0.02   0.04 E 0.06 E bONE 0.03 HE 0.1   0.04   0.04   0.1   0.1   SNOL 0.04 HE 0.07   0.04   0.09   0.1   0.1     Benthic Macroinvertebrates - Methodology Water Quality Score - WQS Definition