What is a healthy COD limit for a total retention wastewater lagoon?
I am talking to a city council and need to explain this on their level. I am working with a plant that has 6, non aerated, lagoon cells that are total retention. Their COD level came back as 1415. I know this is high due to heavy sludge and algae - but would like to give the council a COD number that is considered "healthy" for comparison.