208 



ANNUAL REPORT OF THE 



Off. Doc. 



below 70 except when the water comes from a limestone region wiien 

 a larger a mount \Aill be expected. The above iigures are all ex- 

 pressed hi parts per million. 



An examination of a nnmber of wells and one spring nsed as the 

 water supply for country homes gave results indicated in the follow- 

 ing table. The last iiumber in the table shows the character of the 

 water in a small stream heavily charged with sewage from the bor- 



oiTgh of West Chester: 



Impure Water. 



Source. 





y 



bo 



o 



13 







o 



1 



2 



3 



4 



5 



6 



7 



S 



9 



10 



11 



12 



13 



14 



15 



16 



17 



IS 



19 



Well, 



Well, 



Spring-, 



Well, 



Well, 



Well, 



Well, 



V\'ell, 



Well. 



Well, 



Well, 



Well, 



Well, 



Well, 



Well, 



Well, 



Well, 



Well. 



49.00 

 11.00 



4.00 

 14.00 

 30.00 

 4S.40 



3.2 

 27.44 

 55.00 

 69.00 



6.5 

 12.4 

 19.6 



S.OO 



10.4 



5.2 



7.6 



250.00 



Abundant. 



OO 



Trace. 



00.05 



00.625 



0.3 



o.oos 



Heavy trace. 



0.11 



00.02 



Trace. 



Present. 



None. 



Considerable 



None. 

 None. 

 0.4, 

 OO 



8.00 



6.00 

 21.7 



3.5 

 16.7 



2.00 

 13.00 

 15.00 

 20.00 



2.75 

 10. 00 

 10.00 

 12.5 



6.5 

 5.5 

 2.0 

 00 



0.032 

 0.0065 

 0.025 

 0.124 

 0.84 

 0.035 

 0.12 

 0.116 

 0.0S4 

 0.064 

 0.4 

 O.OIS 

 0.02 

 Trace. 



O.0C5 

 0.016 

 1.128 

 24.08 



0.260 



0.041 



0.060 



0.141) 



0.38 



0.072 



0.224 



0.22 



0.14 



0.196 



0.41 



0.016 



0.052 



0.068 



0.024 

 0.018 

 0.296 

 0.704 



393.00 

 156.00 

 ICO. 00 



171.00 

 202.00 

 132.00 



303.00 

 540.00 

 142.00 

 161.00 

 208.00 

 126.00 

 ,045.00 

 138.00 

 113.00 

 108.00 



.V comparison of these results with those given in the table repre- 

 senting the unpolluted waters reveals a very decided contrast, and 

 shows at a glance the remarkable extent of contamination in the 

 water supply of the farm house. iSuch a high degree of pollution as 

 this is nut to be found m the water supply of any city or town so far 

 as m}- knowledge goes. It is very fortunate for manj- of those 

 who dwell in the country that the consumption of water containing 

 fecal matter or other filth in solution does not alw^ays produce fatal 

 results or even cause disease. Such waters as those represented in 

 the table are, however, a constant menace to health and even to life 

 and should unhesitatingly be condemned for household use. Several 

 of these analyses were made at the request of physicians who re- 

 garded the water supply as the cause of typhoid fever or other in- 

 testinal disturbances and in three instances at least deaths resulted. 



In every instance in which I have been able to inspect the premises, 

 I have found no sources of pollution except those for which the in- 



