Results, 水道水で年1回、井戸水なら年2回の水質検査をお勧めします。

水道水suidousuidetoshi1回井戸水idomizuならnaratoshi2回no水質検査suishitsukensawoお勧めosusumeしますshimasu
We recommend that mains water have a water-quality test carried out once a year, well water twice a year.

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