RIO GRANDE BASIN

08251500 RIO GRANDE NEAR LOBATOS, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD.--September 1969 to current year. September 1969 to September 1993 under the National Stream-Quality Accounting Network (NASQAN). April 1993 to September 1996 under the Rio Grande National Water-Quality Assessment Program. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=08251500

PERIOD OF DAILY RECORD.--

SPECIFIC CONDUCTANCE: October 1975 to September 1981.

WATER TEMPERATURE: October 1975 to September 1981.

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, water, fltrd, mg/L (00930)	Chlor- ide, water, fltrd, mg/L (00940)	Fluor- ide, water, fltrd, mg/L (00950)
OCT
08...	1115	20	9.3	8.8	476	12.0	87	22.9	7.26	8.24	68.5	18.1	0.84
MAR
26...	1030	67	9.1	7.9	319	8.0	90	27.6	5.23	4.08	30.9	8.57	0.45
MAY
27...	1215	142	8.7	8.4	247	19.0	74	22.1	4.49	4.54	21.6	4.87	0.4
JUN
11...	1030	266	7.7	8.2	182	16.0	58	17.2	3.55	3.34	16.0	3.55	0.3
JUL
17...	1030	36	8.0	8.7	299	19.5	94	27.5	6.12	4.85	29.6	7.30	0.5
AUG
20...	0930	8.1	8.0	9.0	411	16.0	68	16.8	6.26	6.19	59.6	17.1	0.8

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

Date	Silica, water, fltrd, mg/L (00955)	Sulfate water, fltrd, mg/L (00945)	Residue on evap. at 180degC wat flt mg/L (70300)	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)	Phos- phorus, water, fltrd, mg/L (00666)	Phos- phorus, water, unfltrd mg/L (00665)	Alum- inum, water, fltrd, ug/L (01106)	Anti- mony, water, fltrd, ug/L (01095)
OCT
08...	21.3	54.8	308	0.34	0.52	<0.04	<0.06	<0.008	<0.02	0.010	0.047	2	E.17
MAR
26...	27.8	34.1	214	0.18	0.37	<0.04	<0.06	<0.008	0.02	0.025	0.067	--	--
MAY
27...	23.1	20.5	152	0.40	0.70	<0.04	<0.06	<0.008	0.03	0.047	0.151	2	<0.30
JUN
11...	19.3	15.2	124	0.30	0.73	<0.04	<0.06	<0.008	0.03	0.039	0.174	2	<0.30
JUL
17...	20.7	23.4	196	E.25	E.54	<0.04	<0.06	<0.008	E.01	E.018	E.081	E1	<0.30
AUG
20...	5.55	52.6	245	0.34	0.51	<0.04	<0.06	<0.008	<0.02	0.010	0.045	--	--

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

Date	Arsenic water, fltrd, ug/L (01000)	Barium, water, fltrd, ug/L (01005)	Beryll- ium, water, fltrd, ug/L (01010)	Cadmium water, fltrd, ug/L (01025)	Chrom- ium, water, fltrd, ug/L (01030)	Cobalt water, fltrd, ug/L (01035)	Copper, water, fltrd, ug/L (01040)	Iron, water, fltrd, ug/L (01046)	Lead, water, fltrd, ug/L (01049)	Mangan- ese, water, fltrd, ug/L (01056)	Molyb- denum, water, fltrd, ug/L (01060)	Nickel, water, fltrd, ug/L (01065)	Selen- ium, water, fltrd, ug/L (01145)
OCT
08...	6	51	<0.06	E.03	<0.8	0.46	1.2	E8	E.05	14.7	6.9	1.22	<3
MAR
26...	--	--	--	--	--	--	--	18	--	102	--	--	--
MAY
27...	3	34	<0.06	<0.04	<0.8	0.25	1.0	54	0.29	69.5	3.0	1.51	<3
JUN
11...	E2	25	<0.06	E.02	<0.8	0.17	1.0	37	0.18	23.9	1.6	0.82	<3
JUL
17...	4	34	<0.06	<0.04	<0.8	0.26	0.8	9	<0.08	34.7	4.5	1.23	<3
AUG
20...	--	--	--	--	--	--	--	9	--	12.1	--	--	--

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

Date	Silver, water, fltrd, ug/L (01075)	Zinc, water, fltrd, ug/L (01090)	Uranium natural water, fltrd, ug/L (22703)
OCT
08...	<0.20	2	2.78
MAR
26...	--	--	--
MAY
27...	<0.20	2	0.89
JUN
11...	<0.20	1	0.40
JUL
17...	<0.20	M	1.19
AUG
20...	--	--	--
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value. M -- Presence of material verified but not quantified.