Drinking water quality standards are regulations that ensure the safety of drinking water by establishing acceptable levels of contaminants. These standards are created by various organizations, including the WHO, EPA, and national bodies, and include guidelines on microbial, chemical, and physical parameters. Local authorities often adopt these international standards while tailoring them to specific regional needs.

1. Drinking Water Quality Standards
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Drinking water quality standards are guidelines and regulations that establish the
acceptable levels of various contaminants and parameters in drinking water to ensure
its safety for human consumption. These standards are set by national and international
organizations to protect public health. Here are some commonly recognized drinking
water quality standards:
1. World Health Organization (WHO) Guidelines for Drinking-water Quality:
● The WHO sets guidelines for various chemical, physical, and
microbiological parameters in drinking water. These guidelines cover a

2. wide range of contaminants, including microbial pathogens, chemical
substances, and radiological hazards.
2. United States Environmental Protection Agency (EPA) Safe Drinking Water Act:
● The EPA sets maximum contaminant levels (MCLs) for regulated
contaminants in drinking water in the United States. It establishes
standards for a variety of substances, including microbial contaminants,
disinfectants, disinfection byproducts, inorganic chemicals, organic
chemicals, and radionuclides.
3. European Union Drinking Water Directive:
● The European Union has established a directive that sets quality standards
for drinking water in member states. It covers parameters such as
microbiological quality, chemical substances, and indicator parameters.
4. Indian Standard for Drinking Water (IS 10500):
● In India, the Bureau of Indian Standards (BIS) has set the IS 10500
standard, which provides guidelines for drinking water quality. It covers
parameters such as microbiological quality, chemical substances, toxic
elements, and pesticide residues.
5. Australian Drinking Water Guidelines:
● The Australian Drinking Water Guidelines provide recommendations and
guidance for the management of drinking water supplies in Australia. It
covers various microbial, chemical, and radiological parameters.
It's important to note that specific drinking water quality standards may vary between
countries and regions. Local authorities and regulatory bodies often adopt and enforce
their own set of standards based on these international guidelines. It is recommended
to consult the relevant local guidelines and authorities for specific information regarding
drinking water quality standards in your area.