GUNNISON RIVER BASIN

09113980 OHIO CREEK ABOVE MOUTH, NEAR GUNNISON, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD--November 1996 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09113980

REMARKS--Prior to September 1998, published as site number 383516106555000.

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

Date	Time	Instan- taneous dis- charge, cfs (00061)	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)	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)	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)
OCT
16...	1400	18	8.9	8.0	402	12.0	0.15	<0.015	<0.022	<0.002	0.015	0.029	<2.0
DEC
04...	1330	26	10.0	8.2	262	3.5	0.17	<0.015	E.015	<0.002	0.016	0.046	<2.0
FEB
12...	1330	14	11.0	7.9	164	0.1	E.09	<0.015	E.020	<0.002	0.015	0.031	<2.0
APR
16...	1320	55	9.0	8.3	163	8.3	0.59	E.009	0.169	0.003	0.012	0.149	2.5
JUN
18...	1345	163	7.7	8.1	294	17.7	0.43	<0.015	<0.022	E.002	0.033	0.078	<2.0
AUG
27...	1320	18	7.8	8.5	249	19.0	0.21	<0.015	<0.022	<0.002	0.025	0.057	<2.0

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

Date	E coli, m-TEC MF, water, col/ 100 mL (31633)
OCT
16...	<1
DEC
04...	E6
FEB
12...	E3
APR
16...	E10
JUN
18...	E32
AUG
27...	38
< -- 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	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)	Biomass peri- phyton, ashfree drymass g/m2 (49954)
AUG
27...	1325	1,200	1,189	744	24	45.4	33.8

MISCELLANEOUS FIELD MEASUREMENTS, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003

Date	Time	Instan- taneous dis- charge, cfs (00061)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)		Date	Time	Instan- taneous dis- charge, cfs (00061)	Specif. conduc- tance, wat unf uS/cm 25 degC (00095)	Temper- ature, water, deg C (00010)
OCT						MAY
02...	0946	20	438	8.5		05...	1802	46	297	11.2
NOV						27...	1535	278	175	17.8
13...	1535	17	370	5.0
APR
02...	1155	59	195	4.2