What Is a One Part Per Million Solution?
The Safe Water Drinking Act of 1974 requires the EPA to set and enforce standards of safety for drinking water in the United States. Have older students check resources in the library or on the Internet to identify the substances considered hazardous by the EPA, and at which concentrations.
Water treatment plants typically pass water though a complex filtering process to remove suspended particles, and to add chlorine to kill disease-causing organisms. Sometimes, water also is sprayed into the air to help evaporate certain chemicals and improve its taste and smell. Organize a class visit to your municipal water treatment plant, or have a representative from the local water or health department visit your classroom.
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Funded by the following grant(s)
The Environment as a Context for Opportunities in Schools
Grant Numbers: 5R25ES010698, R25ES06932
Foundations for the Future: Capitalizing on Technology to Promote Equity, Access and Quality in Elementary Science Education