Residential Water Rate Calculator

REMINDER:  New water rates go into effect on Oct. 1, 2017


Use this calculator to determine what your water bill will be under the new rates that go into effect Oct. 1, 2017. The new rates will be reflected in bills received starting in mid-November. The new rates will be in place year-round. Prior to Oct. 1, the City charged according to usage tiers only during the summer.

Here are the previous and new tier rates:

TiersPrevious rate* New rateChange
Tier 1$2.49$2.490
Tier 2$3.11$3.110
Tier 3$3.74$3.740
Tier 4$4.98$5.6062 cents

*per 1,000 gallons

The  volume in each tier would change under the planned program. Below are current and proposed tier volumes. Under the new structure, these volume tiers will apply year-round, not just in the summer months.

TiersPrevious volumeNew volume
Tier 10-18,0000-15,000
Tier 218,001-24,00015,001-21,000
Tier 324,001-30,00021,001-27,000
Tier 430,001 and up27,001 and up


The average residential customer in Round Rock uses about 13,000 gallons a month during the peak summer months.

The base fee for residential customers with a 5/8 inch meter is $16.04.

For tips on how to conserve water and save money, visit our water conservation page.