DDW-2025-000974

January 29, 2025
Via Email: [e-mail]
Aldo Biasi
Parowan City Water System
P.O. Box 576
Parowan, Utah 84761
Subject:System-SpecificMinimum Sizing Standards—Final Determination
Parowan City Water System, System #11010, File #13106Amended letter Supersedes Letter Dated December 12, 2023
Dear Aldo Biasi:
DETERMINATIONS
Based on the findings set forth below, the Division of Drinking Water (the Division) hereby establishes the following system-specific minimum sizing standards for Parowan City Water
System(the System):
Peak Day Source Demand (gallons/day/ERC) – 1,033
Average Annual Demand (gallons/year/ERC) – 204,765
Equalization Storage (gallons/ERC) – 561
Fire Storage (gallons) – 180,000
Introduction
Pursuant to Utah Code Section 19-4-114, the Director of the Division (Director) is required to establish system-specific minimum sizing standards based on, among other factors, water
use data submitted to the Division of Water Rights (DWRi). The Director’s determinations may also be based on engineering analyses and other evidence if this is available. This final
determination letter is addressed to you in your capacity as the Administrative Contact for the System. The Director has delegated the responsibility for making system-specific minimum
sizing standards under Utah Code Section 19-4-114 to the Engineering Manager for the Division.Prior to issuing this final determination letter, the Division reviewed an engineering report
prepared by Aaron Anderson, P.E. of Bowen Collins & Associates dated September 22, 2023. The Division sent back review comments and received an updated engineering report on October
16, 2023. A summary of the water use data and calculations the Division used to make these determinations is attached as part of the administrative record. The letter was amended on
December 12, 2023, to clarify that the sizing standards are based on the engineering study dated October 16, 2023, and not directly from the water use data available through DWRi. The
letter was amended again on January 27, 2025 due to a software issue on the Division's module that was corrected in late January 2025.
Water Use Data Definitions
As used in this Final Determination, the following terms have the following meanings:
Peak Day Source Demand is the total flow into a public water system to meet the demand of the water system on the day of the highest water consumption in a calendar year.
Average Annual Demandis the total quantity of drinking water flowing into a public water system within a calendar year.
Total Equivalent Residential Connections (ERCs) term represents the number of residential service connections and the number of equivalent residential connections for non-residential
connections (commercial, industrial, institutional connections).
Minimum Equalization Storagerequirement is a volume that is equivalent to the amount of water needed to meet the average day culinary demand for public water systems. Equalized storage
per ERC is calculated by dividing the Average Annual Demand per ERC data by the number of operational days in a year.
Water System Background Facts
The System is a community water system in Iron County, Utah. The System provides water to approximately 2,800 people through 1,431 residential, 80 commercial, and five (5) industrial
connections. The system currently operates and maintains four (4) water sources, three (3) wells and one (1) spring, with two (2) storage tanks. The System also has an additional well
that is currently proposed.System-Specific Minimum Sizing Standards—BackgroundUnder Utah Code Section 19-4-114, the legislature required that the Director establish minimum sizing standards
on a system-specific basis instead of statewide, as the Division has done in the past. System-specific determinations need to be based on system-specific information. The code allows
the Director to rely on water use data submitted to DWRi. Alternatively, a community water system may perform and submit an engineering study to the Division if the water system’s water
use data is not representative of future use or the water system does not yet have actual water use data. In this matter, actual water use data was available through DWRi, and an engineering
study was not submitted to the Division for review. Therefore, the Division has relied upon DWRi information and other relevant data.
Additional System-Specific Basis for Determinations
The Division established Fire Storage requirements based on information from the engineering report dated October 16, 2023, which was completed with the direction of the Local Fire Authority.
Storage Capacity
Based on the System’s storage facilities and the storage minimum sizing requirement established in this letter, the Director hereby determines that the System iscompliant with the minimum
storage capacity requirements.
Source Capacity
The Division has adequate documentation of established safe yields (wells) and yields (springs) for all the System’s sources. Using total system-wide safe yields and yields and the source
minimum sizing requirement established in this letter indicates that the System is compliant with minimum source capacity requirements.
Effective Date
The determinations made in this letter are effective immediately and will become final 30 days from the date of this letter unless the System files a contest as provided below.
Notice of Right to Contest
The Director has determined this determination made under Section 19-3-114 qualifies as a “permit order” within the meaning of Utah Code Section 19-1-301.5(1)(f). See Utah Code § 19-1-301.5(1)(e)
(defining “permit” to include a “plan” or “other administrative authorization”).
The System may contest any determinations made herein by delivering a notice of contest to the Director. The notice of contest must be in writing and must be delivered to the Director
on or before 30 days after the date this letter is signed. There is no particular form for the notice of contest, but it must include the System’s reasons and rationale for the contest.
The Director’s address for purposes of submitting a notice of contest is as follows:
U.S. Mail
Division of Drinking Water
Attention: Director

P.O. Box 144830
Salt Lake City, UT 84114-4830
Email
A notice of contest may be submitted to the Director by email, provided, however, that the Director confirms receipt of the email. The Director’s email address is: [e-mail].
The email submission must be received by the Director before the expiration of the contest deadline.
If the System files a timely notice of contest, the Director will evaluate the matter and attempt to resolve the matter through negotiations. If the Director is not able to resolve the
matter, the Director will issue a final agency action regarding the contest. At that point in the process, the System shall have the right to seek further internal agency and judicial
review pursuant to Utah Admin. Code R305-7 and Utah Code Section 19-1-301.5.
Right to Request Reconsideration
The Director plans to evaluate the determinations made herein every three years. However, this requirement is not mandatory. At any time, a water system whose system-specific minimum
sizing standards have been established by the Division under Section 19-4-114 may request reconsideration of the Director’s determinations by submitting a written request. A request
for reconsideration shall be submitted to the Director in the same manner as a notice of contest provided above.
Conclusion
If the Systemmanagement has any questions regarding this letter, please contact Dani Zebelean, P.E.,of this office, at [phone], or me at [phone].
Sincerely,
Michael Newberry, P.E.
Permitting and Engineering Support Manager
DZ/mrn/mdbEnclosuresUtah Department of Environmental Quality Division of Drinking Water Minimum Sizing Standards Summary Reportcc:Jeremy Roberts, Southwest Utah Health Department, [e-mail]
Wright, P.E., DEQ Southwest District Engineer, [e-mail] Biasi, Parowan City Water System, [e-mail] Anderson, Bowen, Collins, & Associates, [e-mail]
Zebelean, P.E., Division of Drinking Water, [e-mail] Black, Office of the State Fire Marshal, [e-mail] 11010 13106 Amended Sizing Standard