GUNNISON RIVER BASIN

09146200 UNCOMPAHGRE RIVER NEAR RIDGWAY, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1995 to September 1998, April 2001 to current year. For a complete listing of historical data available for this site, see
http://waterdata.usgs.gov/co/nwis/inventory/?site_no=09146200

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

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

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)	Hard- ness, water, unfltrd mg/L as CaCO3 (00900)	Calcium water, fltrd, mg/L (00915)	Magnes- ium, water, fltrd, mg/L (00925)	Potas- sium, water, fltrd, mg/L (00935)	Sodium adsorp- tion ratio (00931)	Sodium, water, fltrd, mg/L (00930)	Alka- linity, wat flt fxd end lab, mg/L as CaCO3 (29801)
NOV
13...	1045	62	9.6	8.0	699	6.0	330	115	11.3	1.76	0.6	23.2	E98
APR
23...	1220	107	9.0	8.1	526	7.5	230	80.2	7.54	1.66	0.5	16.1	79
MAY
28...	1100	833	8.7	7.8	236	9.5	96	33.9	2.73	0.92	0.2	4.22	45
AUG
11...	1415	76	8.5	8.4	710	22.4	340	111	14.1	2.29	0.6	24.5	115

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

Date	Chlor- ide, water, fltrd, mg/L (00940)	Fluor- ide, water, fltrd, mg/L (00950)	Silica, water, fltrd, mg/L (00955)	Sulfate water, fltrd, mg/L (00945)	Residue water, fltrd, sum of consti- tuents mg/L (70301)	Residue water, fltrd, tons/ acre-ft (70303)	Residue water, fltrd, tons/d (70302)	Ammonia + org-N, water, fltrd, mg/L as N (00623)	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)
NOV
13...	6.50	0.48	11.2	258	--	--	--	E.06	0.11	0.023	0.148	E.002	<0.007
APR
23...	5.65	0.43	9.6	175	345	0.47	99.8	E.08	0.17	0.037	0.180	0.003	<0.007
MAY
28...	1.30	0.2	6.1	59.6	137	0.19	308	E.09	0.71	E.009	0.213	E.002	<0.007
AUG
11...	5.74	0.5	11.1	235	473	0.64	97.1	<0.10	0.12	0.020	0.072	0.003	<0.007

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

Date	Phos- phorus, water, fltrd, mg/L (00666)	Phos- phorus, water, unfltrd mg/L (00665)	E coli, m-TEC MF, water, col/ 100 mL (31633)	Fecal coli- form, M-FC 0.7u MF col/ 100 mL (31625)	Cadmium water, fltrd, ug/L (01025)	Copper, water, fltrd, ug/L (01040)	Iron, water, unfltrd recover -able, ug/L (01045)	Lead, water, fltrd, ug/L (01049)	Mangan- ese, water, fltrd, ug/L (01056)	Mangan- ese, water, unfltrd recover -able, ug/L (01055)	Mercury water, fltrd, ug/L (71890)	Selen- ium, water, fltrd, ug/L (01145)	Silver, water, fltrd, ug/L (01075)
NOV
13...	0.005	0.045	E2	E4	0.3	3.2	830	<1	147	183	<0.02	<3	<0.3
APR
23...	<0.004	0.099	E8	E3	0.4	3.6	2,000	<1	192	284	<0.02	<3	<0.3
MAY
28...	0.005	2.82	E40	67	<0.2	2.6	21,400	M	39.3	2,180	<0.02	<3	<0.3
AUG
11...	0.005	0.026	E16	E20	E.1	3.6	280	<1	48.5	55.5	<0.02	<3	<0.3

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

Date	Zinc, water, fltrd, ug/L (01090)
NOV
13...	39
APR
23...	50
MAY
28...	7
AUG
11...	4
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value. M -- Presence of material verified but not quantified.

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						JUN
01...	1250	82	631	12.0		24...	1215	251	471	13.4
JAN						AUG
07...	1400	43	815	5.2		12...	1340	76	727	20.5
APR
02...	1420	74	640	11.6