I get calls almost daily from people who tell me their water and sewer bills have doubled or or even tripled overnight.... they never go down, unless you reduce your usage.
The best way to combat these cost is to put in a reclaim system. Typically, a good reclaim system will cut your water and sewer by about 70%, depending on how much or little reclaim you want to use. Some sugar coat it and tell you 80% or 90% or more, but the truth is, 70% is a pretty good rule of thumb.
If you have a Spot Free RO rinse system, this is another area you can potentially save a lot of money. These are typically water hogs and all to often the owner's are putting the reject water to drain....big mistake! If you capture that water in a tank and re-pressurize it, you can put it back into your wash processes. This reduces the amount of incoming fresh water, thus reduces sewer cost proportionally. It cost a little upfront but the long-term return can pay for itself over and over.
I actually have clients that tell me they aren't making money washing cars, their real profit is from the savings they see by reducing water and sewer costs. Some have said without a reclaim system, they couldn't afford to be in business.
Reclaim isn't for everyone and in fact I suggest you avoid it if possible. But when it's the difference between profit and no profit or increasing that bottom line, it can certainly be a wise investment.
If your water and sewer bills are over $ 1,000.00 a month, you can usually justify the expense and expect a fair ROI.