you guys make me so envious - rain water! - we had 13mm in the whole of 2019
and my tap water is desalinated ..... (on the days it flows
, on the other days the goats have managed to nibble through the municipal pipe to have a drink themselves! We have a 2000L reserve tank for the house for these occasions!)
makes growing any plants, not just orchids, a challenge. At least the garden plants can have the 'grey' water - and they seem to thrive on it
(No main sewage systems here, we all have our own tanks in which to process ALL our waste from kitchens and bathrooms which then gets pumped around the garden at night.)