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 w^hich failed to show the presence of B. coli and 30 
which did not show chemical pollution. 
Of the 17 springs in Maryland pronoimced 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. 
1 Sanitary 
rating. 
Chemical 
analysis. 
B. coli 
1 commu- 
nis. 
* Number 
of wells. 
Number 
1 
1 springs. 
Number 
of 
cisterns. 
G 
+ 
1 
+ 
4 
i 
4 
G 
+ 
1 
1 
G 
- 
-1- 
i 
10 
i 
G 
- 
- 
9 
> 8 
1 i 
G 
? 
+ 
8 
i ^ 
4 
G 
? 
3 
B 
+ 
+ 

1 
B 
+ 
1 
B 
+ 
2 
6 
B 
_ 
5 
B 
+ 
1 
B 
0 
2 
3 
? 
+ 
+ 
1 
3 
o 
- 
+ 
3 
1 
2 
9 
- 
- 
2 
1 
? 
0 1 
+ 
2 
2 
2 
? 
^ i 
1 
