PLATTE RIVER BASIN

403147105083800 HORSETOOTH RESERVOIR NEAR SPRING CANYON DAM NEAR FORT COLLINS, CO

WATER-QUALITY RECORDS

PERIOD OF RECORD.--May 1983 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=403147105083800

REMARKS.--Samples collected near the south end of reservoir near Spring Canyon Dam.

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

Date	Time	Sam- pling depth, feet (00003)	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)
MAY
15...	1117	0.50	8.1	7.3	82	12.8
15...	1118	5.00	8.1	7.3	81	11.9
15...	1119	10.0	8.1	7.2	80	11.2
15...	1120	15.0	8.0	7.2	78	10.8
15...	1121	20.0	8.0	7.2	77	10.5
15...	1122	25.0	7.9	7.1	77	10.2
15...	1123	30.0	7.8	7.1	76	9.9
15...	1124	35.0	7.6	7.1	76	9.7
15...	1125	40.0	7.5	7.1	75	9.3
15...	1126	45.0	7.6	7.0	74	8.9
15...	1127	50.0	7.4	6.9	73	8.6
15...	1128	55.0	7.4	6.9	71	8.1
15...	1129	60.0	7.3	6.9	71	7.7
15...	1130	65.0	7.1	6.9	70	7.5
15...	1131	70.0	7.0	6.9	71	7.5
15...	1132	75.0	6.7	6.8	71	7.4
AUG
27...	1055	0.50	7.7	7.8	44	21.8
27...	1056	5.00	7.6	7.8	44	21.2
27...	1057	10.0	6.6	7.7	42	20.6
27...	1058	15.0	6.8	7.5	39	19.5
27...	1059	20.0	6.7	7.4	38	18.9
27...	1100	25.0	6.7	7.4	38	18.6
27...	1101	30.0	6.8	7.3	38	18.4
27...	1102	35.0	6.5	7.3	39	17.7
27...	1103	40.0	2.6	7.2	59	12.3
27...	1104	45.0	2.3	7.0	64	10.6
27...	1105	50.0	1.7	7.0	67	9.7
27...	1106	55.0	1.3	6.9	68	9.3
27...	1107	60.0	1.4	6.9	69	9.1
27...	1108	65.0	0.7	6.9	70	9.0
27...	1109	70.0	0.4	6.8	71	8.8
27...	1110	75.0	0.2	6.8	73	8.6
27...	1111	80.0	0.1	6.8	73	8.6
27...	1112	85.0	0.1	6.8	74	8.6

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

Date	Time	Sam- pling depth, feet (00003)	Trans- parency Secchi disc, inches (00077)	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)
MAY
15...	1140	0.10	84.0	8.1	7.3	82	12.8	34	10.4	1.95	0.99	0.3	3.60
15...	1150	75.0	--	6.7	6.8	71	7.4	31	9.78	1.68	0.86	0.2	2.85
AUG
27...	1115	0.10	48.0	7.7	7.8	44	21.8	23	7.08	1.25	0.68	0.2	1.99
27...	1130	85.0	--	0.1	6.8	74	8.6	37	11.3	2.06	0.96	0.2	3.10

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

Date	ANC, wat unf fixed end pt, lab, mg/L as CaCO3 (90410)	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 on evap. at 180degC wat flt mg/L (70300)	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)
MAY
15...	31	4.20	<0.2	4.02	4.8	49	0.08	59	0.30	0.040	0.092	0.003	<0.007
15...	32	1.72	<0.2	3.92	3.8	44	0.07	48	0.32	0.102	0.045	0.003	0.007
AUG
27...	21	1.27	0.1	2.72	3.0	31	0.05	38	0.26	<0.015	<0.013	<0.002	<0.007
27...	34	2.39	0.2	5.88	4.1	52	0.08	58	0.17	<0.015	0.316	<0.002	0.026

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)	Organic carbon, water, unfltrd mg/L (00680)	E coli, m-TEC MF, water, col/ 100 mL (31633)	Chloro- phyll a phyto- plank- ton, fluoro, ug/L (70953)	Chloro- phyll b phyto- plank- ton, fluoro, ug/L (70954)	Barium, water, fltrd, ug/L (01005)	Beryll- ium, water, fltrd, ug/L (01010)	Boron, water, fltrd, ug/L (01020)	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)
MAY
15...	0.007	0.016	3.7	--	E1.0	<0.1	18.3	<0.5	<13	<0.2	<0.8	0.059	4.3
15...	0.011	0.021	3.0	--	--	--	15.1	<0.5	<13	<0.2	<0.8	0.040	3.3
AUG
27...	E.004	0.024	3.2	E1	E5.3	<0.1	15.0	<0.4	E5.7	<0.2	<0.8	0.034	2.9
27...	0.033	0.054	3.1	--	--	--	16.4	<0.4	E6.3	<0.2	<0.8	0.061	3.0

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

Date	Iron, water, fltrd, ug/L (01046)	Lead, water, fltrd, ug/L (01049)	Lithium water, fltrd, ug/L (01130)	Mangan- ese, water, fltrd, ug/L (01056)	Mangan- ese, water, unfltrd recover -able, ug/L (01055)	Molyb- denum, water, fltrd, ug/L (01060)	Nickel, water, fltrd, ug/L (01065)	Silver, water, fltrd, ug/L (01075)	Stront- ium, water, fltrd, ug/L (01080)	Vanad- ium, water, fltrd, ug/L (01085)	Zinc, water, fltrd, ug/L (01090)
MAY
15...	16	<0.08	1.7	10.9	11.2	0.5	0.57	<0.3	54.1	0.3	2
15...	E8	<0.08	1.3	29.8	42.8	0.5	0.56	<0.3	52.3	0.2	2
AUG
27...	23	<0.08	0.9	0.3	<0.6	0.5	0.33	<0.3	26.4	0.5	<1
27...	23	<0.08	1.3	62.7	168	0.5	0.53	<0.3	49.1	0.2	1
< -- Actual value is known to be less than the value shown. E -- Estimated laboratory analysis value.