NORWALK RIVER BASIN 01209710 NORWALK RIVER AT WINNIPAUK, CT LOCATION.--Lat 4108'07", long 7325'36", Fairfield County, Hydrologic Unit 01100007, on Perry Ave., 0.6 mi south of Winnipauk, and 0.3 mi upstream from confluence of Silvermine River. DRAINAGE AREA.--33.0 mi2. PERIOD OF RECORD.--October 1980 to current year. WATER-QUALITY DATA, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996 DIS- PH OXYGEN, COLI- ENTERO- CHARGE, SPE- WATER DIS- FORM, COCCI INST. CIFIC WHOLE SOLVED FECAL, ME,MF CUBIC CON- FIELD TEMPER- TEMPER- TUR- OXYGEN, (PER- 0.45 WATER FEET DUCT- (STAND- ATURE ATURE BID- DIS- CENT UM-MF TOTAL DATE TIME PER ANCE ARD AIR WATER ITY SOLVED SATUR- (COLS./ (COL / SECOND (US/CM) UNITS) (DEG C) (DEG C) (NTU) (MG/L) ATION) 100 ML) 100 ML) (00061) (00095) (00400) (00020) (00010) (00076) (00300) (00301) (31616) (31649) OCT 31... 1140 48 270 7.9 14.0 10.0 -- 12.0 105 160 43 JAN 18... 1050 21 430 7.7 8.0 1.5 1.4 14.0 99 60 29 FEB 21... 0945 152 384 7.6 10.0 2.0 8.2 14.8 107 120 248 APR 24... 0945 124 274 7.7 10.0 14.0 1.0 10.9 108 96 K6 JUN 18... 0930 27 290 7.8 26.0 19.0 1.6 8.8 95 7900 4900 JUL 08... 0930 70 349 7.8 25.0 21.0 7.5 8.4 95 8200 5400 AUG 07... 1300 17 372 8.3 34.0 23.5 0.90 9.6 112 440 K12 SEP 20... 0915 55 293 8.0 27.0 15.0 2.5 10.3 102 800 220 CAR- BICAR- ALKA- HARD- MAGNE- POTAS- BONATE BONATE LINITY CHLO- FLUO- NESS CALCIUM SIUM, SODIUM, SIUM, WATER WATER WAT DIS SULFATE RIDE, RIDE, TOTAL DIS- DIS- DIS- DIS- DIS IT DIS IT TOT IT DIS- DIS- DIS- (MG/L SOLVED SOLVED SOLVED SOLVED FIELD FIELD FIELD SOLVED SOLVED SOLVED DATE AS (MG/L (MG/L (MG/L (MG/L MG/L AS MG/L AS MG/L AS (MG/L (MG/L (MG/L CACO3) AS CA) AS MG) AS NA) AS K) CO3 HCO3 CACO3 AS SO4) AS CL) AS F) (00900) (00915) (00925) (00930) (00935) (00452) (00453) (39086) (00945) (00940) (00950) OCT 31... 94 24 8.3 20 3.4 -- 67 55 27 37 <0.10 JAN 18... 100 27 8.6 40 3.7 -- 71 58 21 78 <0.10 FEB 21... 84 22 7.0 38 2.7 -- 52 43 16 73 <0.10 APR 24... 73 19 6.1 21 2.7 -- 51 42 15 43 <0.10 JUN 18... 86 23 7.0 21 2.8 -- 65 53 15 41 <0.10 JUL 08... 100 27 8.4 24 3.4 -- 80 66 17 49 <0.10 AUG 07... 110 30 9.4 26 3.4 0 92 75 16 53 <0.10 SEP 20... 81 21 6.9 18 3.0 0 76 62 14 36 <0.10 NORWALK RIVER BASIN 01209710 NORWALK RIVER AT WINNIPAUK, CT--Continued WATER-QUALITY DATA, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996 SOLIDS, NITRO- NITRO- NITRO- NITRO- NITRO- SILICA, RESIDUE SOLIDS, GEN, GEN, GEN, NITRO- GEN,AM- GEN,AM- DIS- AT 180 RESIDUE NITRITE NO2+NO3 AMMONIA GEN, MONIA + MONIA + NITRO- SOLVED DEG. C AT 105 DIS- DIS- DIS- ORGANIC ORGANIC ORGANIC GEN, (MG/L DIS- DEG. C, SOLVED SOLVED SOLVED TOTAL TOTAL DIS. TOTAL DATE AS SOLVED TOTAL (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L SIO2) (MG/L) (MG/L) AS N) AS N) AS N) AS N) AS N) AS N) AS N) (00955) (70300) (00500) (00613) (00631) (00608) (00605) (00625) (00623) (00600) OCT 31... 9.3 177 172 <0.010 0.170 <0.015 0.40 0.40 0.30 0.57 JAN 18... 8.3 233 238 <0.010 0.830 0.100 0.10 0.20 0.30 1.0 FEB 21... 8.7 216 230 0.010 0.950 0.110 0.29 0.40 <0.20 1.3 APR 24... 4.6 147 158 <0.010 0.310 <0.015 0.20 0.20 0.20 0.51 JUN 18... 6.7 176 174 0.030 0.890 0.180 0.42 0.60 0.50 1.5 JUL 08... 7.1 195 246 0.020 0.600 0.130 0.57 0.70 0.30 1.3 AUG 07... 4.2 196 206 0.010 0.310 0.030 0.27 0.30 0.20 0.61 SEP 20... 8.9 159 192 0.010 0.410 0.020 0.38 0.40 0.30 0.81 PHOS- PHOS- PHORUS ALUM- ANTI- BERYL- CHRO- PHOS- PHORUS ORTHO, INUM, MONY, BARIUM, LIUM, CADMIUM MIUM, COBALT, PHORUS DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- TOTAL SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED DATE (MG/L (MG/L (MG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L AS P) AS P) AS P) AS AL) AS SB) AS BA) AS BE) AS CD) AS CR) AS CO) (00665) (00666) (00671) (01106) (01095) (01005) (01010) (01025) (01030) (01035) OCT 31... 0.070 0.060 0.070 13 <1.0 33 <1.0 <1.0 <1.0 <1.0 JAN 18... 0.010 0.010 0.010 6.0 <1.0 42 <1.0 <1.0 1.0 <1.0 FEB 21... 0.030 <0.010 0.010 11 <1.0 35 <1.0 <1.0 <1.0 <1.0 APR 24... 0.030 <0.010 <0.010 16 <1.0 40 <1.0 <1.0 <1.0 <1.0 JUN 18... 0.060 0.040 0.030 10 <1.0 41 <1.0 <1.0 <1.0 <1.0 JUL 08... 0.160 0.040 0.040 8.0 <1.0 44 <1.0 <1.0 <1.0 <1.0 AUG 07... 0.040 0.020 0.040 4.0 <1.0 42 <1.0 <1.0 <1.0 <1.0 SEP 20... 0.060 0.040 0.070 13 <1.0 35 <1.0 <1.0 <1.0 <1.0 MANGA- MOLYB- URANIUM COPPER, IRON, LEAD, NESE, DENUM, NICKEL, SILVER, ZINC, NATURAL CARBON, DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- DIS- ORGANIC SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED TOTAL DATE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (MG/L AS CU) AS FE) AS PB) AS MN) AS MO) AS NI) AS AG) AS ZN) AS U) AS C) (01040) (01046) (01049) (01056) (01060) (01065) (01075) (01090) (22703) (00680) OCT 31... 3.0 150 <1.0 22 <1.0 2.0 <1.0 11 <1.0 8.4 JAN 18... 3.0 90 <1.0 39 <1.0 2.0 <1.0 19 <1.0 2.9 FEB 21... 2.0 62 <1.0 29 <1.0 1.0 <1.0 18 <1.0 4.1 APR 24... 2.0 100 <1.0 24 <1.0 1.0 <1.0 8.0 <1.0 4.3 JUN 18... 3.0 130 <1.0 41 1.0 1.0 <1.0 12 <1.0 5.2 JUL 08... 1.0 130 <1.0 85 <1.0 1.0 <1.0 6.0 <1.0 12 AUG 07... 2.0 110 <1.0 27 1.0 1.0 <1.0 5.0 <1.0 3.7 SEP 20... 2.0 110 <1.0 22 1.0 1.0 <1.0 6.0 <1.0 7.3