Stream Ecology
Temperature / pH / Dissolved Oxygen
The maximum amount of DO			Temperature Ranges for Aquatic Life
that can occur in water at a
specific temperature is listed			More than 20 °C (68 °F):
below.			Many plants, bass, crappie, bluegill, carp, sucker,
			caddis fly larvae, many fish diseases
°C	°F	DO (ppm)
			20 - 14 °C (68 - 57 °F):
0	32	14.6	Some plant life, trout, walleye, northern pike, stonefly
1	34	14.2	nymph, caddisfly larvae, water beetles, water striders,
2	36	13.8	some fish diseases
3	37	13.4
4	39	13.1	Less than 14 °C (57 °F):
5	41	12.8	Few plants, trout, caddisfly larvae, stonefly nymph,
6	43	12.4	mayfly nymph, few fish diseases
7	45	12.1
8	46	11.8
9	48	11.5	Dissolved Oxygen Requirements for Native Aquatic Life
10	50	11.3
11	53	11.0	Trout spawning . . . . . . . . . . . . . . . . . . . . .				7 ppm and up
12	54	10.8	Trout growth and well-being . . . . . . . . . . . .				6 ppm
13	55	10.6	Bass and crappie growth and well-being . . .				5 ppm
14	57	10.3
15	59	10.1
16	61	9.9	pH Ranges that Support Aquatic Life
17	63	9.7	1    2    3   4    5    6    7    8    9   10   11   12   13   14
18	64	9.5
19	66	9.3	Bacteria:	1.5_____________________________________13.5
20	68	9.1
21	70	8.9	Plants:		6.5________________12.0
22	72	8.8
23	73	8.6	Carp,suckers,catfish:		6.0_______9.0
24	75	8.5
25	77	8.3	Bass, crappies:		6.5____8.5
26	79	8.2
27	81	8.0	Snails, clams, mussels:			7.5__9.0
28	82	7.9
29	84	7.7	Trout, aquatic invertebrates:           6.5_7.5
30	86	7.6	(most mayfly, stonefly, and caddisfly nymphs)