GUNNISON RIVER BASIN

383103106594200 GUNNISON RIVER AT COUNTY ROAD 32 BELOW GUNNISON, CO

WATER-QUALITY RECORDS

LOCATION.--Lat 38°31'03", long 106°59'42", in SW14SE14 sec. 8, T.49 N., R.1 W., Gunnison County, Hydrologic Unit 14020002, at County Road 32 bridge, 0.25 mi south of US HWY 50, and 3.3 mi west of Gunnison.

DRAINAGE AREA.--2,128 mi2.

PERIOD OF RECORD.--December 1994 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=383103106594200

PERIOD OF DAILY RECORD.--WATER TEMPERATURE: October 1996 to September 1998.

INSTRUMENTATION.--Water temperature sensor and logger, October 1996 to September 1998.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Turbid- ity, wat unf lab, Hach 2100AN NTU (99872)	Dis- solved oxygen, mg/L (00300)	pH, water, unfltrd field, std units (00400)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)	Hard- ness, water, unfltrd mg/L as CaCO3 (00900)	Calcium water, fltrd, mg/L (00915)	Magnes- ium, water, fltrd, mg/L (00925)	Ammonia + org-N, water, unfltrd mg/L as N (00625)	Ammonia water, fltrd, mg/L as N (00608)	Nitrite + nitrate water fltrd, mg/L as N (00631)
OCT
16...	1230	255	3.1	9.4	8.2	282	6.5	140	42.7	8.83	0.25	<0.015	0.032
DEC
04...	1530	248	3.7	11.3	8.4	259	1.0	130	37.0	8.27	E.09	<0.015	0.025
FEB
13...	1240	249	5.0	10.9	8.5	230	0.2	120	34.9	7.75	0.18	<0.015	0.078
APR
17...	1300	384	E4.6	10.1	8.6	235	8.1	110	33.7	6.98	0.26	<0.015	0.104
JUN
19...	1455	1,260	1.1	8.7	8.3	241	15.0	130	37.9	7.70	0.28	<0.015	E.018
AUG
29...	0840	487	2.7	8.4	8.1	240	12.4	120	34.5	7.27	0.16	<0.015	0.078

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Nitrite water, fltrd, mg/L as N (00613)	Ortho- phos- phate, water, fltrd, mg/L as P (00671)	Phos- phorus, water, unfltrd mg/L (00665)	BOD, water, unfltrd 5 day, 20 degC mg/L (00310)	E coli, m-TEC MF, water, col/ 100 mL (31633)
OCT
16...	<0.002	0.009	0.014	<2.0	<1
DEC
04...	<0.002	E.005	0.017	<2.0	E1
FEB
13...	<0.002	0.011	0.049	<2.0	<1
APR
17...	E.002	0.012	0.036	<2.0	E1
JUN
19...	E.002	E.004	0.025	<2.0	23
AUG
29...	<0.002	0.012	0.033	<2.0	71
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Cadmium water, fltrd, ug/L (01025)	Copper, water, fltrd, ug/L (01040)	Lead, water, fltrd, ug/L (01049)	Mangan- ese, water, fltrd, ug/L (01056)	Selen- ium, water, fltrd, ug/L (01145)	Silver, water, fltrd, ug/L (01075)	Zinc, water, fltrd, ug/L (01090)
OCT
16...	<0.04	0.4	0.10	12.4	<0.5	<0.2	1
DEC
04...	<0.04	0.5	E.07	15.9	<0.5	<0.2	1
FEB
13...	<0.04	0.5	<0.08	10.2	E.3	<0.2	1
APR
17...	<0.04	1.0	0.10	26.9	E.4	<0.2	3
JUN
19...	E.02	0.7	E.06	21.4	<0.5	<0.2	3
AUG
29...	<0.04	0.7	<0.08	16.4	<0.5	<0.2	1
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Biomass peri- phyton, ashfree drymass g/m2 (49954)	Peri- phyton biomass ash weight, g/m2 (00572)	Peri- phyton biomass dry weight, g/m2 (00573)	Biomass chloro- phyll ratio, peri- phyton, number (70950)	Pheo- phytin a, peri- phyton, mg/m2 (62359)	Chloro- phyll a peri- phyton, chromo- fluoro, mg/m2 (70957)
AUG
29...	0845	<7.400	840	849.9	356	13	20.8
< -- Actual value is known to be less than the value shown.