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 1996 TO SEPTEMBER 1997 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 13... 1145 178 60 7.0 13.0 4.0 .80 14.2 105 K2 K19 JAN 14... 1015 84 64 7.0 3.0 0.0 .70 14.8 101 K1 120 MAR 12... 1015 116 62 7.1 8.0 1.5 .70 14.0 107 K1 <1 MAY 13... 0845 108 65 7.4 20.0 13.5 1.4 10.2 100 K10 K7 JUN 05... 0845 39 72 7.6 14.0 13.5 1.2 10.1 98 21 K13 JUL 28... 0915 5.9 100 7.6 26.5 22.0 1.0 8.5 95 120 84 AUG 19... 0915 12 90 7.5 18.5 18.5 1.3 9.0 97 75 77 SEP 08... 0900 4.3 98 7.5 19.0 17.5 .78 8.6 91 290 200 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 13... 15 3.6 1.4 4.9 1.0 -- 11 9 5.1 8.5 <.10 JAN 14... 16 3.8 1.5 5.2 .90 0 9 7 6.9 9.2 <.10 MAR 12... 14 3.4 1.3 5.1 .70 0 10 8 6.2 8.5 <.10 MAY 13... 15 3.9 1.4 5.6 .77 0 10 8 5.4 8.5 <.10 JUN 05... 17 4.2 1.7 6.0 .84 0 13 11 5.5 9.7 <.10 JUL 28... 25 6.3 2.2 7.2 1.5 0 22 18 4.8 13 <.10 AUG 19... 22 5.6 1.9 6.6 1.3 0 20 16 6.4 11 <.10 SEP 08... 25 6.5 2.2 7.4 1.3 0 22 18 6.8 12 <.10 THAMES RIVER BASIN 01120800 NATCHAUG RIVER AT CHAPLIN, CT--Continued WATER-QUALITY DATA, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997 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 13... 9.0 49 56 .010 .170 .020 .18 .20 <.20 .37 JAN 14... 9.4 45 60 <.010 .220 .030 -- <.20 <.20 -- MAR 12... 7.2 43 46 <.010 .170 <.015 -- <.20 <.20 -- MAY 13... 5.6 45 49 <.010 .100 <.015 -- <.20 <.20 -- JUN 05... 7.1 48 65 <.010 .177 .028 -- <.20 <.20 -- JUL 28... 5.5 68 66 <.010 .167 <.015 -- <.20 .25 -- AUG 19... 5.5 69 62 <.010 .110 <.015 -- .25 .22 .36 SEP 08... 5.0 60 65 <.010 .117 .024 -- <.20 <.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 13... .020 <.010 <.010 53 <1.0 6.0 <1.0 <1.0 <1.0 <1.0 JAN 14... <.010 <.010 <.010 29 <1.0 6.0 <1.0 <1.0 <1.0 <1.0 MAR 12... .010 <.010 <.010 25 <1.0 5.0 <1.0 <1.0 <1.0 <1.0 MAY 13... .012 <.010 <.010 26 <1.0 6.0 <1.0 <1.0 <1.0 <1.0 JUN 05... <.010 <.010 <.010 22 <1.0 5.5 <1.0 <1.0 <1.0 <1.0 JUL 28... <.010 <.010 <.010 10 <1.0 5.9 <1.0 <1.0 <1.0 <1.0 AUG 19... <.010 <.010 <.010 12 <1.0 6.3 <1.0 <1.0 <1.0 <1.0 SEP 08... <.010 <.010 <.010 8.2 <1.0 6.8 <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 13... 1.0 210 <1.0 10 <1.0 <1.0 <1.0 2.0 <1.0 5.5 JAN 14... <1.0 92 <1.0 15 <1.0 <1.0 <1.0 <1.0 <1.0 2.8 MAR 12... <1.0 62 <1.0 11 <1.0 <1.0 <1.0 1.0 <1.0 2.7 MAY 13... <1.0 120 <1.0 9.0 <1.0 <1.0 <1.0 1.0 <1.0 3.9 JUN 05... <1.0 170 <1.0 10 <1.0 <1.0 <1.0 1.5 <1.0 3.4 JUL 28... <1.0 62 <1.0 17 <1.0 <1.0 <1.0 <1.0 <1.0 3.6 AUG 19... <1.0 110 <1.0 17 <1.0 <1.0 <1.0 <1.0 <1.0 4.5 SEP 08... <1.0 53 <1.0 14 <1.0 <1.0 <1.0 1.1 <1.0 3.0