In 2009, Castle Rock Water implemented a unique increasing block rate structure, with tiers based on an indoor and outdoor water budget. Tier 1 only encompasses indoor water use, at a relatively low rate to acknowledge the value of indoor water use as essential to life. The indoor water budget for each customer is based on the average winter monthly consumption (AWMC) use at the site (i.e. the average monthly consumption between Nov. – Feb.). Tier 2 accommodates water use that exceeds 100% of expected indoor use and up to 100% of expected outdoor use. Water use in this range is charged at more than double the rate for Tier 1 water use, providing a clear signal of the importance of outdoor water conservation. The outdoor water budget is based on the landscape area at the property and adjusted if residents participate in Castle Rock’s turf replacement program. In addition, customers receive a flat monthly service charge based on the size of the meter (Table 4). The 2023 residential water rates for Castle Rock are shown in Table 3, the flat monthly service charge in Table 4 and the non-residential water rates are shown in Table 5.

Table 3. Town of Castle Rock residential water rates, 2023

AMWC = average monthly winter consumption

Table 4. Town of Caste Rock water monthly service charges, 2023

Table 5. Town of Castle Rock non-residential water rates, 2023

AMWC = average monthly winter consumption

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