The regulations of § 19 WHG (German Federal Water Act) apply. There are no further requirements for storage of products < 1000 l. Chlorine produced by electrolysis is classified as "WGK 1", low hazardous to waters according to water pollution classes. When storing quantities of > 1000 l of the product, only a separate drip pan with integrated leakage probe is required. (As per 2015)