BASIN: Information on Water Quality Parameters

	City of Boulder/USGS Water Quality Monitoring
	Diurnal Variations of Water Quality Parameters in Boulder Creek
	Data obtained from 1986 and 1987, Aquatic and Wetland Consultants, Inc. (AWC) diurnal (24-hour) sampling study of Boulder Creek and Coal Creek water quality.

hour	DO	pH	temp (stream)	SC	temp (air)	discharge (ft3/sec)
Feb-05-87
4	8.6	7.5	3.2	110	-10	65.2
5	8.2	7.5	2.7	164	-11	55
6	9.8	7.6	2	157	-12	43
7	10.6	7.6	1.5	136	-12	39
8	10.6	7.7	1.5	146	-6	33
9	11.2	7.6	1.5	152	-4	29
10	12	7.7	2.2	147	-2	27
11	12.4	7.9	3.4	148	0	27
12	12.6	7.9	4	174	5	27
13	12.6	8.2	6.2	187	6	41
14	12.6	8.5	7.2	209	10	45
15	12.3	8.8	7.7	229	9	39
16	12.2	8.3	7.8	223	8	39
17	11.6	8.3	7.6	237	6	39
18	11	8.2	7.4	229	4	39
19	11	8.1	7.2	216	-2	39
20	9	8.1	6.1	275	-4	41
21	9	8	5.4	282	-6	43
22	9	8.1	5	253	-6	45
23	9	8.2	4.5	245	-6	45
24	9	8	4	257	-7	47
25	9	8	4	268	-8	63.1
26	8.8	7.8	3.5	259	-10	133.8
27	8.8	7.7	3.5	258	-10	136.7

Chart DISCHARGE

Chart SPECIFIC CONDUCTANCE

Chart FIGURE 1: AIR TEMPERATURE

Chart FIGURE 4: pH

Chart FIGURE 3: DISSOLVED OXYGEN

Chart FIGURE 2: WATER TEMPERATURE

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