602 
showed chemical and bacterial pollution, 6 showed chemical pollu- 
tion only, 8 showed bacterial contamination only, 22 showed neither, 
20 were suspicious chemically, and of these 20 there were 12 which 
showed the presence of B. coli. 
There were 36 which failed to show the presence of B. coli and 30 
which did not show chemical pollution. 
Of the 17 springs in Maryland pronounced good on sanitary inspec- 
tion, 2 showed bacterial pollution alone, 10 were found to be 
unpolluted either chemically or bacteriologically, 5 were suspicious 
chemically, and one of these showed the presence of B. coli. In all, 14 
did not show B. coli, 10 did not show chemical pollution, and 5 showed 
some evidence of chemical pollution. 
Of the 14 wells in Maryland which were pronounced bad on sanitary 
inspection, 6 showed evidence of chemical pollution, 6 showed no 
evidence of such pollution, and 2 were suspicious. Three showed both 
chemical and bacteriological pollution and 3 showed neither. 
Of the 19 springs classed as bad from the sanitary survey, 6 showed 
evidence of chemical pollution, 6 showed no evidence of chemical 
pollution, and 3 showed neither chemical nor bacterial pollution. 
Seven were suspicious from chemical analysis, and 6 of these con- 
tained B. coli. 
Of 9 springs which were classed as suspicious from the sanitary sur- 
vey, 3 showed neither chemical nor bacteriological pollution. None 
showed both. 
All the cisterns showed either bacterial or chemical pollution or 
both. 
Table II. — Virginia dairies. 
Sanitary 
rating. 
Chemical 
analysis. 
! B. coli 
commu- 
nis. 
Number 
of wells. 
Number 
of 
springs. 
Number 
of 
cisterns. 
G 
+ 
+ 
4 
4 
G 
+ 
1 
1 
G 
- 
+ 
7 
10 
G 
- 
- 
9 
8 
1 I 
G 
•f 
+ 1 
8 
3 
4 
G 
? 
_ 
3 
B 
+ 
+ 
1 
B 
+ 

1 
B 
+ 
2 1 
6 
B 
5 
B 
0 
+ 
1 
B 
? 1 
2 
3 
? 
+ 
+ 
1 
3 
? 
- 
+ 
3 
1 
2 
? 
- 
- 
2 
1 
? 
? 
+ 
2 
2 
2 
? 
9 
- 
1 
