Certified Water Specialist (CWS)

A Certified Water Specialist (CWS) has been certified by the Water Quality Association in helping consumers identify individuals in the point-of-use/point-of-entry water quality improvement industry who have demonstrated a certified level of professional expertise and are dedicated to high professional standards.

To achieve any WQA-certified title (CWS, CI, CSR), a person must pass a lengthy exam, agree to abide by the WQA Code of Ethics for the Water Quality Improvement Industry and commit to ongoing education to maintain certification.

Certified Water Specialist Qualifications

FDA (Food and Drug Administration)

FDA Logo

Only seven types of plastic are considered “food grade” by the U.S. Food & Drug Administration. Plastics used to package food must be of high quality and cannot contain harmful dyes or chemicals.

Polypropylene (PP) is perfect for containing products that are bottled while hot and allowed to cool before shipment. It has a high melting point and is often used to contain foods that are packaged when hot, such as ketchup or maple syrup. It is very strong and can be used for twist-on caps and lids, such as the type on soda bottles, and drinking straws used at fast-food restaurants. Mass marketed plastic storage containers are often made of PP.

SPI Resin Codes  

Made in the USA

H2O Distributors, Inc. is proud to feature American-made products on its web site. All such products will be marked with a icon.


Serving manufacturers operating in 81 countries, NSF was founded in 1944 and is headquartered in Ann Arbor, MI USA. The NSF mark is recognized for its value in international trade around the world and is respected by regulatory agencies at the local, state, and federal levels.

NSF International Information

WQA (Gold Seal)

The Water Quality Association’s Gold Seal Certification Program is dedicated to providing public health and safety services throughout the USA and globally, while maintaining expert service, superior reputation, and fair pricing. The Gold Seal Program offers certification of all products and chemicals that contact drinking water.

WQA Gold Seal Program  

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