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Water quality is depended on 3 aspects include physical, chemical and biological aspect.

Water quality can be assessed by comparing the measurement data with local or international standards. The purposes for those standards are to protect human's health and safety and to provide a healthy aquatic environment for the organisms.

Through the measurement data, the condition of water and pollution trend can be observed, and a monitoring programme can be designed to prevent the condition from getting worse.


Common Parameters of Water & Wastewater Testing Method
Biochemical Oxygen Demand (BOD5) 5-day BOD Test Method
Chloride (Cl-) Content Titrimetric Method
Chemical Oxygen Demand (COD) - Close reflux Colorimetric Method
Chemical Oxygen Demand (COD) - Open reflux Titrimetric Method
Color Visual Comparison Method
Conductivity Electrometric Method
Iron (Fe) Content Colorimetric Method
Oil & Grease (O & G) Gravimetric Method
pH value Electrometric Method
Total Suspended Solids (TSS) Gravimetric Method
Turbidity Nephelometric Method
Sulfide (S2-) Content Colorimetric Method

* We also can provide other testing methods and parameter as client's required

PIT Limited is a HOKLAS accredited laboratory (HOKLAS 212) which provides customers with an array of environmental testing services. Our laboratory enables to analyze various samples with high efficiency, precision and accuracy that fulfill the needs of our customers in a professional and scientific way. We specialize in water/wastewater testing.

Most of our tests comply with international recognized methods such as APHA Standard Methods for the Examination of Water and Wastewater that is the most widely accepted methods for water/wastewater testing especially using in Government Laboratory, Environment Protection Department (EPD), Water Supplies Department (WSD) and Drainage Services Department (DSD).

HOKLAS accreditation has been granted for most of the common water/wastewater tests. For details of the scope of accreditation, please refer to the HKAS website or
http://www.itc.gov.hk/en/quality/hkas/doc/
hoklas/212.pdf