THAMES RIVER BASIN 01120800 NATCHAUG RIVER AT CHAPLIN, CT LOCATION.--Lat 4148'03", long 7207'07", Windham County, Hydrologic Unit 01100002, at Bear Hill Road , 0.5 mi northeast of Chaplin. DRAINAGE AREA.--67.9 mi2. PERIOD OF RECORD.--May 1962 to September 1964, March 1995 to present. 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) NOV 08... 1100 243 71 6.9 14.0 7.0 1.4 11.5 98 3600 100 JAN 12... 1045 -- 74 6.8 -7.0 0.0 0.50 12.9 89 K5 K3 MAR 06... 1030 284 67 7.0 0.0 1.0 1.2 14.6 106 K10 K9 JUN 05... 1230 105 67 7.2 28.0 18.5 1.3 9.5 102 140 33 JUL 09... 1230 31 73 7.4 31.0 24.0 1.7 8.2 100 600 600 AUG 12... 1000 18 85 7.7 23.0 20.0 0.70 9.3 103 26 39 SEP 13... 0900 17 85 7.5 16.0 17.0 1.0 8.4 88 57 180 BICAR- ALKA- HARD- MAGNE- POTAS- BONATE LINITY CHLO- FLUO- NESS CALCIUM SIUM, SODIUM, SIUM, WATER WAT DIS SULFATE RIDE, RIDE, TOTAL DIS- DIS- DIS- DIS- DIS IT TOT IT DIS- DIS- DIS- (MG/L SOLVED SOLVED SOLVED SOLVED FIELD FIELD SOLVED SOLVED SOLVED DATE AS (MG/L (MG/L (MG/L (MG/L MG/L AS MG/L AS (MG/L (MG/L (MG/L CACO3) AS CA) AS MG) AS NA) AS K) HCO3 CACO3 AS SO4) AS CL) AS F) (00900) (00915) (00925) (00930) (00935) (00453) (39086) (00945) (00940) (00950) NOV 08... 18 4.3 1.7 4.8 1.1 9 7 8.0 8.4 <0.10 JAN 12... 19 4.8 1.8 5.6 1.0 12 10 7.0 9.2 <0.10 MAR 06... 15 3.6 1.4 5.9 0.80 8 7 6.4 10 <0.10 JUN 05... 15 3.8 1.4 5.6 0.80 11 9 5.1 9.3 <0.10 JUL 09... 18 4.4 1.6 6.0 1.0 14 12 5.2 10 <0.10 AUG 12... 21 5.4 1.8 6.7 1.1 18 15 4.9 11 <0.10 SEP 13... 23 5.9 1.9 7.2 1.3 18 15 5.3 12 <0.10 THAMES RIVER BASIN 01120800 NATCHAUG RIVER AT CHAPLIN, 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) NOV 08... 8.3 51 48 <0.010 0.130 <0.015 0.30 0.30 0.30 0.43 JAN 12... 11 49 54 <0.010 0.270 0.030 0.37 0.40 <0.20 0.67 MAR 06... 7.9 49 60 <0.010 0.400 <0.015 -- <0.20 <0.20 -- JUN 05... 6.2 50 42 <0.010 0.120 0.030 0.27 0.30 0.20 0.42 JUL 09... 6.9 51 64 0.010 0.200 0.020 0.28 0.30 0.20 0.50 AUG 12... 8.0 61 70 0.010 0.170 0.020 -- <0.20 0.20 -- SEP 13... 7.4 61 60 <0.010 0.180 <0.015 -- <0.20 <0.20 -- 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 08... <0.010 <0.010 <0.010 56 <1.0 7.0 <1.0 <1.0 <1.0 <1.0 JAN 12... <0.010 <0.010 <0.010 32 <1.0 8.0 <1.0 <1.0 1.0 <1.0 MAR 06... <0.010 <0.010 <0.010 33 <1.0 7.0 <1.0 <1.0 <1.0 <1.0 JUN 05... 0.010 <0.010 <0.010 32 <1.0 6.0 <1.0 <1.0 <1.0 <1.0 JUL 09... <0.010 <0.010 <0.010 39 <1.0 5.0 <1.0 <1.0 <1.0 <1.0 AUG 12... <0.010 <0.010 0.010 27 <1.0 5.0 <1.0 <1.0 <1.0 <1.0 SEP 13... <0.010 0.020 <0.010 15 <1.0 6.0 <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 08... <1.0 170 <1.0 12 <1.0 <1.0 <1.0 3.0 <1.0 7.3 JAN 12... 2.0 220 <1.0 10 <1.0 2.0 <1.0 3.0 <1.0 3.5 MAR 06... <1.0 65 <1.0 13 <1.0 <1.0 <1.0 2.0 <1.0 3.1 JUN 05... <1.0 220 <1.0 8.0 <1.0 <1.0 <1.0 1.0 <1.0 4.9 JUL 09... <1.0 310 <1.0 13 <1.0 <1.0 <1.0 <1.0 <1.0 5.9 AUG 12... <1.0 350 <1.0 10 <1.0 <1.0 <1.0 <1.0 <1.0 5.3 SEP 13... <1.0 200 <1.0 8.0 <1.0 <1.0 <1.0 <1.0 <1.0 3.7