CONNECTICUT RIVER BASIN 01193050 CONNECTICUT RIVER AT MIDDLE HADDAM, CT LOCATION.--Lat 4132'30", long 7233'13", Middlesex County, Hydrologic Unit 01080205, on pier of United Aircraft Corporation (formerly Connecticut Advanced Nuclear Engineering Laboratory, CANEL), 0.8 mi south of Middle Haddam, 7.6 mi upstream from Salmon River, and 6.1 mi south of Middletown. DRAINAGE AREA.--10,897 mi2 rev. PERIOD OF RECORD.--Water year 1967 to current year. PERIOD OF DAILY RECORD.-- SPECIFIC CONDUCTANCE: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 1993, October 1994 to current year. pH: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 1993, October 1994 to current year. WATER TEMPERATURES: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 1993, October 1994 to current year. DISSOLVED OXYGEN: October 1967 to September 1970, October 1973 to June 1976, June 1978 to September 1993, October 1994 to current year. INSTRUMENTATION.--Water-quality monitor October 1967 to September 1993. REMARKS.--U.S.G.S. water-quality monitoring system installed June 1978. Interruptions of the record due to mal- functions of the instrument. Instantaneous records are representative of the cross section while continuous records are based on point samples. The instantaneous record values will not necessarily fall within the corresponding daily range of the continuous records due to the depth and location of the intake pipes and the pumping methods used for the monitoring system. In addition to water-quality monitor record, samples were collected approximately once a month, June 19, 1967 to September 1976. Samples were collected quarterly November 1976 to July 1981. Monthly sampling began again October 1981. Stream tidal affected. Extremes for period of daily record and current year are only for those values reported. EXTREMES FOR PERIOD OF DAILY RECORD.-- SPECIFIC CONDUCTANCE: Maximum, 483 microsiemens Aug. 18, 1975; minimum, 33 microsiemens March 23, 1980. pH: Maximum, 9.7 units July 3, 1975; minimum, 4.9 units Apr. 23, 1976. WATER TEMPERATURES: Maximum, 33.0C July 12, 1970; minimum, 0.0C on many days during winter periods. DISSOLVED OXYGEN: Maximum, 19.7 mg/L Oct. 17, 18, 1994; minimum 0.6 mg/L Aug. 11, 1970. EXTREMES FOR CURRENT YEAR.-- SPECIFIC CONDUCTANCE: Maximum, 194 microsiemens Oct. 26; minimum, 82 microsiemens Jan. 23. pH: Maximum, 8.7 units Oct 18, 19; minimum, 6.4 units May 22. WATER TEMPERATURES: Maximum, 31.0C July 29, Aug. 1,2; minimum, 0.0C Jan. 6,7. DISSOLVED OXYGEN: Maximum, 19.7 mg/L Oct. 17, 18; minimum 1.6 mg/L Aug. 5. WATER-QUALITY DATA, WATER YEAR OCTOBER 1994 TO SEPTEMBER 1995 PH OXYGEN, COLI- ENTERO- SPE- WATER DIS- FORM, COCCI HARD- CIFIC WHOLE SOLVED FECAL, ME,MF NESS CALCIUM CON- FIELD TEMPER- TEMPER- TUR- OXYGEN, (PER- 0.45 WATER TOTAL DIS- DUCT- (STAND- ATURE ATURE BID- DIS- CENT UM-MF TOTAL (MG/L SOLVED DATE TIME ANCE ARD AIR WATER ITY SOLVED SATUR- (COLS./ (COL / AS (MG/L (US/CM) UNITS) (DEG C) (DEG C) (NTU) (MG/L) ATION) 100 ML) 100 ML) CACO3) AS CA) (00095) (00400) (00020) (00010) (00076) (00300) (00301) (31616) (31649) (00900) (00915) OCT 13... 1030 136 7.1 19.0 14.0 1.7 9.0 86 660 35 42 13 JAN 10... 1035 160 7.4 1.5 0.5 1.5 13.2 90 920 450 33 10 MAR 17... 1035 154 7.3 10.0 5.0 3.7 12.8 100 660 132 29 9.0 MAY 09... 1145 148 7.4 23.0 14.0 -- 9.7 93 <1 K3 46 15 JUN 08... 1215 121 7.1 23.0 22.5 1.5 8.0 93 34 K13 37 12 JUL 06... 0930 161 7.9 36.0 25.0 1.6 8.3 99 24 <1 42 13 AUG 17... 1030 143 7.1 29.5 28.0 2.1 6.6 85 24 K4 40 12 SEP 18... 1050 175 7.3 19.0 20.0 1.8 6.9 76 200 42 42 13 CONNECTICUT RIVER BASIN 01193050 CONNECTICUT RIVER AT MIDDLE HADDAM, CT--Continued WATER-QUALITY DATA, WATER YEAR OCTOBER 1994 TO SEPTEMBER 1995 CAR- BICAR- ALKA- SOLIDS, MAGNE- POTAS- BONATE BONATE LINITY CHLO- FLUO- SILICA, RESIDUE SOLIDS, SIUM, SODIUM, SIUM, WATER WATER WAT DIS SULFATE RIDE, RIDE, DIS- AT 180 RESIDUE DIS- DIS- DIS- DIS IT DIS IT TOT IT DIS- DIS- DIS- SOLVED DEG. C AT 105 SOLVED SOLVED SOLVED FIELD FIELD FIELD SOLVED SOLVED SOLVED (MG/L DIS- DEG. C, DATE (MG/L (MG/L (MG/L MG/L AS MG/L AS MG/L AS (MG/L (MG/L (MG/L AS SOLVED TOTAL AS MG) AS NA) AS K) CO3 HCO3 CACO3 AS SO4) AS CL) AS F) SIO2) (MG/L) (MG/L) (00925) (00930) (00935) (00452) (00453) (39086) (00945) (00940) (00950) (00955) (70300) (00500) OCT 13... 2.3 10 1.8 0 39 32 9.9 15 <0.10 5.4 86 96 JAN 10... 2.0 10 1.3 0 28 23 8.9 16 <0.10 7.3 80 92 MAR 17... 1.5 7.6 1.1 0 24 20 7.1 11 <0.10 6.0 66 68 MAY 09... 2.1 8.9 1.3 0 41 34 9.6 13 <0.10 4.8 80 98 JUN 08... 1.8 8.6 1.3 0 32 26 9.0 11 <0.10 5.4 75 84 JUL 06... 2.2 13 1.6 0 37 30 12 17 <0.10 1.2 88 100 AUG 17... 2.4 11 2.1 0 21 22 12 15 <0.10 4.4 79 80 SEP 18... 2.4 13 2.6 0 42 34 13 19 0.10 2.8 97 110 NITRO- NITRO- NITRO- NITRO- NITRO- PHOS- GEN, GEN, GEN, NITRO- GEN,AM- GEN,AM- PHOS- PHORUS ALUM- ANTI- NITRITE NO2+NO3 AMMONIA GEN, MONIA + MONIA + NITRO- PHOS- PHORUS ORTHO, INUM, MONY, DIS- DIS- DIS- ORGANIC ORGANIC ORGANIC GEN, PHORUS DIS- DIS- DIS- DIS- SOLVED SOLVED SOLVED TOTAL TOTAL DIS. TOTAL TOTAL SOLVED SOLVED SOLVED SOLVED DATE (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (UG/L (UG/L AS N) AS N) AS N) AS N) AS N) AS N) AS N) AS P) AS P) AS P) AS AL) AS SB) (00613) (00631) (00608) (00605) (00625) (00623) (00600) (00665) (00666) (00671) (01106) (01095) OCT 13... 0.040 0.580 0.150 0.25 0.40 0.40 0.98 0.080 0.090 0.080 10 <1 JAN 10... 0.010 0.500 0.190 0.11 0.30 0.50 0.80 0.040 0.030 0.020 6 <1 MAR 17... <0.010 0.400 0.130 0.17 0.30 0.30 0.70 0.060 0.040 0.030 40 <1 MAY 09... 0.020 0.410 0.230 0.27 0.50 0.40 0.91 0.060 0.040 0.030 20 <1 JUN 08... 0.030 0.440 0.150 0.05 0.20 <0.20 0.64 0.070 0.050 0.050 10 <1 JUL 06... 0.030 0.520 0.040 0.36 0.40 0.30 0.92 0.090 0.080 0.070 10 <1 AUG 17... 0.020 2.30 0.030 0.57 0.60 <0.20 2.9 0.110 0.050 0.050 9 <1 SEP 18... 0.070 0.920 0.270 0.33 0.60 0.60 1.5 0.190 0.180 0.170 10 <1 CONNECTICUT RIVER BASIN 01193050 CONNECTICUT RIVER AT MIDDLE HADDAM, CT--Continued WATER-QUALITY DATA, WATER YEAR OCTOBER 1994 TO SEPTEMBER 1995 CHRO- BERYL- CADMIUM MIUM, CHRO- COPPER, IRON, BARIUM, LIUM, TOTAL CADMIUM TOTAL MIUM, COBALT, TOTAL COPPER, TOTAL IRON, DIS- DIS- RECOV- DIS- RECOV- DIS- DIS- RECOV- DIS- RECOV- DIS- SOLVED SOLVED ERABLE SOLVED ERABLE SOLVED SOLVED ERABLE SOLVED ERABLE SOLVED DATE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L AS BA) AS BE) AS CD) AS CD) AS CR) AS CR) AS CO) AS CU) AS CU) AS FE) AS FE) (01005) (01010) (01027) (01025) (01034) (01030) (01035) (01042) (01040) (01045) (01046) OCT 13... 18 <1 <1 <1.0 <1 <1 <1 2 2 310 110 JAN 10... 8 <1 -- <1.0 -- <1 <1 -- <1 -- 120 MAR 17... 12 <1 -- <1.0 -- <1 <1 -- 1 -- 81 MAY 09... 18 <1 -- <1.0 -- <1 <1 -- 2 -- 120 JUN 08... 16 <1 -- <1.0 -- <1 <1 -- 2 -- 94 JUL 06... 18 <1 -- <1.0 -- <1 <1 -- 3 -- 11 AUG 17... 17 <1 -- <1.0 -- <1 <1 -- 2 -- 37 SEP 18... 19 <1 -- <1.0 -- <1 <1 -- 3 -- 97 LEAD, MANGA- MOLYB- NICKEL, ZINC, URANIUM TOTAL LEAD, NESE, DENUM, TOTAL NICKEL, SILVER, TOTAL ZINC, NATURAL CARBON, RECOV- DIS- DIS- DIS- RECOV- DIS- DIS- RECOV- DIS- DIS- ORGANIC ERABLE SOLVED SOLVED SOLVED ERABLE SOLVED SOLVED ERABLE SOLVED SOLVED TOTAL DATE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (MG/L AS PB) AS PB) AS MN) AS MO) AS NI) AS NI) AS AG) AS ZN) AS ZN) AS U) AS C) (01051) (01049) (01056) (01060) (01067) (01065) (01075) (01092) (01090) (22703) (00680) OCT 13... 1 <1 13 <1 1 1 <1.0 <10 2 <1.0 4.6 JAN 10... -- <1 10 <1 -- 2 <1.0 -- <1 <1.0 4.6 MAR 17... -- <1 13 <1 -- <1 <1.0 -- 2 <1.0 4.2 MAY 09... -- <1 31 <1 -- 1 <1.0 -- 2 <1.0 4.3 JUN 08... -- <1 6 <1 -- 2 <1.0 -- 2 <1.0 4.7 JUL 06... -- <1 1 <1 -- 2 <1.0 -- 2 <1.0 5.2 AUG 17... -- <1 10 1 -- 2 <1.0 -- 4 <1.0 4.8 SEP 18... -- <1 21 2 -- 1 <1.0 -- 5 <1.0 6.5