PLATTE RIVER BASIN

06737500 HORSETOOTH RESERVOIR NEAR FORT COLLINS, CO-Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD.--September 1969 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=06737500

REMARKS.--Samples collected near the north end of reservoir near Soldier Canyon Dam. Note that the bottom sample for the August 27 sample is listed first in the table.

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...	1024	0.50	8.6	7.4	74	12.5
15...	1025	5.00	8.7	7.5	73	11.6
15...	1026	10.0	8.5	7.4	72	11.3
15...	1027	15.0	8.4	7.4	72	11.2
15...	1028	20.0	8.5	7.3	72	11.0
15...	1029	25.0	8.2	7.3	72	10.8
15...	1030	30.0	8.3	7.3	72	10.2
15...	1031	35.0	8.3	7.2	72	10.1
15...	1032	40.0	8.3	7.2	71	9.6
15...	1033	45.0	8.2	7.2	71	9.2
15...	1034	50.0	7.9	7.1	71	9.0
15...	1035	55.0	8.1	7.1	71	8.7
15...	1036	60.0	8.0	7.1	71	8.6
15...	1037	65.0	7.8	7.1	71	8.5
15...	1038	70.0	7.8	7.0	71	8.4
15...	1039	75.0	7.6	7.0	72	8.4
15...	1040	80.0	7.4	7.0	71	8.4
15...	1041	85.0	7.7	7.0	72	8.3
AUG
27...	0950	0.50	7.1	7.5	54	22.0
27...	0951	5.00	7.1	7.5	54	21.8
27...	0952	10.0	7.1	7.5	54	21.8
27...	0953	15.0	6.8	7.5	54	21.7
27...	0954	20.0	5.3	7.4	53	21.1
27...	0955	25.0	4.8	7.3	47	20.8
27...	0956	30.0	4.4	7.2	43	20.2
27...	0957	35.0	4.4	7.2	41	20.0
27...	0958	40.0	4.4	7.2	40	19.6
27...	0959	45.0	4.4	7.1	39	19.2
27...	1000	50.0	4.2	7.1	39	19.0
27...	1001	55.0	4.2	7.0	40	18.6
27...	1002	60.0	4.0	7.0	40	18.2
27...	1003	65.0	3.6	6.9	44	17.4
27...	1004	70.0	3.4	6.9	45	17.0
27...	1005	75.0	3.2	6.9	48	16.4
27...	1006	80.0	2.9	6.8	52	15.8
27...	1007	85.0	2.6	6.8	55	15.2
27...	1008	90.0	2.4	6.8	57	14.8

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...	1045	0.10	53.0	8.6	7.4	74	12.5	33	10.2	1.73	0.89	0.2	2.64
15...	1100	85.0	--	7.7	7.0	72	8.3	32	10.1	1.73	0.84	0.2	2.56
AUG
27...	1030	90.0	--	2.4	6.8	57	14.8	30	9.11	1.66	0.80	0.2	2.49
27...	1045	0.10	77.0	7.1	7.5	54	22.0	28	8.54	1.49	0.79	0.2	2.34

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...	33	1.14	<0.2	3.51	4.2	45	0.07	53	0.27	E.008	0.074	0.003	<0.007
15...	33	1.05	<0.2	3.61	4.2	44	0.07	52	0.27	0.044	0.084	0.003	E.005
AUG
27...	26	1.74	0.2	5.09	3.5			57	0.23	<0.015	0.219	<0.002	0.016
27...	26	1.61	<0.2	3.23	3.4	37	0.05	38	0.20	<0.015	<0.022	<0.002	<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)	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...	E.004	0.018	3.3	--	E1.4	<0.1	18.7	<0.5	<13	<0.2	<0.8	0.043	2.6
15...	0.008	0.021	2.8	--	--	--	18.2	<0.5	<13	<0.2	<0.8	0.031	2.5
AUG
27...	0.021	0.017	3.1	--	--	--	15.7	<0.4	E6.1	<0.2	<0.8	0.042	3.0
27...	0.008	0.015	3.2	E2	E4.2	>.1	19.2	<0.4	E6.5	<0.2	<0.8	0.043	2.7

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...	E10	<0.08	1.1	2.2	5.1	0.5	0.58	<0.3	50.1	0.3	6
15...	E7	<0.08	1.0	0.5	7.2	0.5	0.55	<0.3	49.8	0.3	2
AUG
27...	17	<0.08	1.1	--	--	0.5	0.43	<0.3	35.8	0.4	M
27...	11	<0.08	1.0	0.3	3.1	0.5	0.38	<0.3	31.3	0.6	<1
< -- Actual value is known to be less than the value shown. E - Estimated laboratory analysis value.