HOUSATONIC RIVER BASIN 01201487 STILL RIVER AT RT 7 AT BROOKFIELD CENTER, CT LOCATION.--Lat 4127'58", long 7324'13", Fairfield County, Hydrologic Unit 01100005, on bridge on the upstream side of Route 7 South, approximately 800 ft upstream of Silvermine Road. DRAINAGE AREA.--62.3 mi2. PERIOD OF RECORD.--October 1983 to current year. REMARKS.--Water-quality records for this site published under station 01201485 from water year 1984 to water year 1992. 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 14... 1200 170 335 7.7 6.0 5.0 2.4 12.3 95 K4 140 JAN 10... 1030 120 486 7.8 4.5 2.5 1.6 13.3 100 1100 110 MAR 10... 1045 105 398 7.9 6.0 3.0 3.5 12.4 93 420 120 MAY 19... 0945 122 395 7.8 17.0 13.0 9.3 8.3 81 1100 500 JUN 13... 0930 38 543 7.7 26.0 20.0 4.7 6.4 72 560 88 JUL 18... 0945 29 589 7.7 31.0 23.5 5.6 8.4 71 520 260 AUG 11... 0940 19 604 7.7 29.0 21.0 3.7 6.5 73 700 140 SEP 12... 0940 86 282 7.7 25.0 19.0 20 7.7 84 22000 17000 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 14... 130 33 11 20 3.0 0 117 96 16 35 .10 JAN 10... 150 39 12 37 3.0 0 135 111 22 59 .10 MAR 10... 130 35 11 25 2.9 0 117 96 18 45 .10 MAY 19... 140 35 12 25 3.1 0 117 96 18 41 .15 JUN 13... 170 44 15 37 6.0 0 146 120 28 64 .31 JUL 18... 180 49 14 44 6.9 0 124 102 37 72 .42 AUG 11... 180 45 16 44 7.8 0 128 105 32 76 .47 SEP 12... 89 24 7.2 18 3.6 0 78 64 14 30 .17 HOUSATONIC RIVER BASIN 01201487 STILL RIVER AT RT 7 AT BROOKFIELD CENTER, 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 14... 10 197 214 .030 1.90 .090 .21 .30 .30 2.2 JAN 10... 9.5 263 288 .020 2.80 .100 .30 .40 .30 3.2 MAR 10... 6.7 223 238 .020 2.70 .040 .36 .40 .30 3.1 MAY 19... 6.5 233 260 .013 2.76 .124 .43 .55 .27 3.3 JUN 13... 7.8 329 388 .041 6.13 .076 .81 .89 .58 7.0 JUL 18... 7.1 371 414 .039 8.85 .070 .63 .70 .62 9.5 AUG 11... 7.3 372 399 .040 10.5 .118 .61 .73 .48 11 SEP 12... 5.3 164 182 .019 2.88 .058 .56 .62 .31 3.5 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 14... .140 .100 .100 8.0 <1.0 23 <1.0 <1.0 <1.0 <1.0 JAN 10... .230 .150 .180 14 <1.0 28 <1.0 <1.0 <1.0 <1.0 MAR 10... .160 .140 .160 9.0 <1.0 24 <1.0 <1.0 1.0 <1.0 MAY 19... .140 .062 .070 11 <1.0 24 <1.0 <1.0 2.2 <1.0 JUN 13... .199 .169 .164 14 <1.0 30 <1.0 <1.0 <1.0 <1.0 JUL 18... .245 .162 .144 16 <1.0 30 <1.0 <1.0 1.4 <1.0 AUG 11... .254 .205 .216 11 3.8 30 <1.0 <1.0 <1.0 <1.0 SEP 12... .141 .038 .033 17 <1.0 18 <1.0 <1.0 1.3 <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 14... 2.0 62 <1.0 49 1.0 <1.0 <1.0 9.0 <1.0 4.0 JAN 10... 2.0 40 <1.0 84 1.0 <1.0 <1.0 12 <1.0 5.2 MAR 10... 3.0 86 <1.0 71 1.0 <1.0 <1.0 11 <1.0 4.0 MAY 19... 3.4 43 <1.0 90 1.6 1.0 <1.0 7.1 <1.0 4.5 JUN 13... 6.1 78 <1.0 127 12 2.1 <1.0 9.3 1.1 6.9 JUL 18... 6.4 78 <1.0 101 17 2.1 <1.0 12 <1.0 8.2 AUG 11... 7.2 40 <1.0 108 13 3.5 <1.0 15 <1.0 4.9 SEP 12... 5.0 33 <1.0 20 2.8 1.4 <1.0 4.8 <1.0 7.1