HOUSATONIC RIVER BASIN 01205500 HOUSATONIC RIVER AT STEVENSON, CT--Continued WATER-QUALITY RECORDS PERIOD OF RECORD.--Water years 1952-53, 1955-56, 1959, 1961, 1963, 1968 to current year. PERIOD OF DAILY RECORD.-- SPECIFIC CONDUCTANCE: November 1974 to September 1981. WATER TEMPERATURES: November 1974 to September 1981. EXTREMES FOR PERIOD OF DAILY RECORD.-- SPECIFIC CONDUCTANCE: Maximum recorded, 390 microsiemens Sept. 14, 1977; minimum recorded, 46 microsiemens Mar. 25, 1980. WATER TEMPERATURES: Maximum recorded, 30.5ŚC Aug. 3, 6-9, 1976; minimum, 0.0ŚC many days during the winter period. WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 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) NOV 23... 1150 111 263 8.1 12.0 9.5 1.4 11.5 101 K1 K1 JAN 20... 1550 6490 280 7.8 4.0 1.5 4.3 14.0 100 180 128 MAY 12... 1020 112 250 8.3 19.0 14.0 2.3 10.1 98 K7 K3 JUL 22... 1010 110 273 7.8 24.0 24.0 1.1 6.1 73 K8 K1 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) NOV 23... 100 25 9.3 13 2.1 0 106 87 11 19 <.10 JAN 20... 87 21 8.2 17 2.1 0 90 74 11 29 <.10 MAY 12... 95 24 8.7 11 1.5 0 104 85 10 19 <.10 JUL 22... 100 25 9.5 12 1.7 0 115 94 9.4 21 <.10 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) NOV 23... 1.7 155 156 .027 .330 .042 .31 .35 .24 .68 JAN 20... 3.7 155 163 .011 .704 .093 .31 .41 .33 1.1 MAY 12... 1.5 138 145 <.010 .283 .028 .37 .40 .19 .68 JUL 22... 1.5 151 158 .010 .326 <.020 -- .36 .28 .68 HOUSATONIC RIVER BASIN 01205500 HOUSATONIC RIVER AT STEVENSON, CT--Continued WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 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) NOV 23... <.050 <.050 <.010 2.4 <1.0 15 <1.0 <1.0 <1.0 <1.0 JAN 20... .051 .025 .023 11 <1.0 14 <1.0 <1.0 <1.0 <1.0 MAY 12... .025 .004 <.010 7.8 <1.0 13 <1.0 <1.0 <1.0 <1.0 JUL 22... .015 .005 <.010 3.4 <1.0 15 <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) NOV 23... <1.0 16 <1.0 5.2 <1.0 <1.0 <1.0 <1.0 <1.0 3.7 JAN 20... <1.0 48 <1.0 21 <1.0 <1.0 <1.0 1.6 <1.0 5.1 MAY 12... <1.0 20 <1.0 1.2 <1.0 <1.0 <1.0 <1.0 <1.0 4.0 JUL 22... <1.0 <10 <1.0 8.6 <1.0 <1.0 <1.0 <1.0 <1.0 3.9