Understanding your monthly water bill is the first step to determining the costs of watering your lawn. The bill measures your water usage using various standard units of consumption, the most common being centum cubic feet (CCF) and gallons, where 1 CCF equals 748 gallons. 

The local water utility employs a range of rate structures to bill its customers, including:  

• Uniform Rate structure: Charges a constant per-unit price for all metered units of water consumed throughout the year. 
• Increasing Block Rates: Charges higher unit rates for each succeeding block of usage than the previous block(s). 
• Seasonal Rates: Established to promote conservation during peak usage periods and cover a specific time frame.  
• Drought Rates: Similar to Seasonal Rates, these rates depend on the level of drought in the local area, rather than applying higher rates throughout a particular period. 

All these rate structures can substantially increase water bills if you regularly water your lawn.  

The cost of utilities, which includes water bills, can vary significantly by state.  

In 2019, an average family of four in the United States used about 100 gallons of water daily and paid an average of $72.93 for their monthly water bill.  

According to data collected by the World Population Review, the states with the lowest average water costs are Florida, where the average cost of a water bill is $6, followed by Wisconsin and Vermont, with average water costs of $18.