San Jose, Nina Elaine C.  <br/><br/>
Determining the pH level of water in different water stations in Barangay Concepcion Uno, Marikina City in correspondence to the environment protection agency standards with the use of litmus paper. 

 - Marikina City  March 2019 
 - vi, 55pages;  illustration;   28cm 
<br/><br/> Includes: references and appendices 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1. Drinking water -- Philippines -- Standards
<br/><br/><label>LC Class. No.: </label>TD 430   / V36 2019