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  5. Water quality testing
  6. What are the pH and EC measurements necessary for the reuse of drainage? Key points for on-site water quality management.

What are the pH and EC measurements necessary for the reuse of drainage? Key points for on-site water quality management.

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last updated:Feb 14, 2026

ハンナインスツルメンツ・ジャパン
ハンナインスツルメンツ・ジャパン
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Introducing the water quality management points at the drainage treatment site!

As the movement to reuse domestic wastewater (gray water) for planting and irrigation spreads, regular monitoring of pH and EC (electrical conductivity) has become a key factor influencing the reliability of wastewater treatment. This article introduces the importance of pH and EC as indicators of wastewater quality management, along with actual measurement examples. Domestic wastewater refers to the portion of water discharged from households, excluding toilet water (such as from kitchens, sinks, showers, and laundry), and is referred to as "gray water" overseas. It is said to account for 50-80% of household wastewater, and if reused, it has been reported that the amount of drinking water used could be reduced by up to 50%. *For more details on the column, please refer to the related links. Feel free to contact us for more information.

    Water quality testing
排水の再利用.jpg

What are the pH and EC measurements necessary for the reuse of drainage? Key points for on-site water quality management.

排水の再利用.jpg
排水の再利用.jpg
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Water Quality Monitoring Controller "HI520"

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ハンナインスツルメンツ・ジャパン

ハンナインスツルメンツ・ジャパン

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Hanna Instruments was born in Italy and is now a measurement instrument manufacturer headquartered in the United States, producing and selling various measuring instruments such as pH meters, conductivity meters, residual chlorine meters, and ion meters. It leads the world in the field of water quality measurement and has grown to become one of Europe's leading electronic analyzer manufacturers. In particular, the pocket-sized pHep product has revolutionized pH measurement, which previously relied on litmus paper, by making it easy to handle with digital display, and has become synonymous with 'pH meter' in Europe. All products are certified with the CE mark (indicating conformity to legal regulations in the European region), and the manufacturing facility is ISO 9001:2008 certified, ensuring that we provide products manufactured to strict quality standards. Our primary goal is to provide cutting-edge technology in user-friendly products, and we strive daily to develop products that meet our customers' needs.

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