Home
>
Part C - Economic Structure and Performance
>
Chapter Cf - Geography and the Environment
>
Table Group Cf168-285 - The Environment
Contributor
Scott Farrow
Table Cf223-227 - Ambient water quality-percent of rivers and streams in violation of environmental standards: 1975-1997
View Documentation
Cf223
Cf224
Cf225
Cf226
Cf227
Fecal coliform bacteria
Dissolved oxygen
Phosphorus
Dissolved cadmium
Dissolved lead
Row
Year
Percent
Percent
Percent
Percent
Percent
1
1975
36
5
5
----
----
2
1976
32
6
5
----
----
3
1977
34
11
5
----
----
4
1978
35
5
5
----
----
5
1979
34
4
3
4
13
6
1980
31
5
4
1
5
7
1981
30
4
4
1
3
8
1982
33
5
3
1
2
9
1983
34
4
3
1
5
10
1984
30
3
4
Z
Z
11
1985
28
3
3
Z
Z
12
1986
24
3
3
Z
Z
13
1987
23
2
3
Z
Z
14
1988
22
2
4
Z
Z
15
1989
30
3
2
Z
Z
16
1990
26
2
3
Z
Z
17
1991
15
2
2
Z
Z
18
1992
28
2
2
Z
Z
19
1993
31
Z
2
----
----
20
1994
28
2
2
----
----
21
1995
35
1
4
----
----
22
1996
----
1
1
Z
Z
23
1997
----
1
2
Z
Z
Editors
Consultants
Preface
Research Assistants
User Guide
Support for Historical Statistics
Contributors
Acknowledgments
Contact Us
|
Terms of Use
|
HSUS Site Map
Top