DDW-2024-006499

Milford City Water System

BACTERIOLOGICAL SAMPLE SITING PLAN

PWS ID# UTAH01003

Milford City
405 South Main
PO Box 69
Milford, Utah 84751
[phone]

Last Update: October 31, 2016

Purpose/Objective
As part of the Total Coliform Rule, Utah Department of Environmental Quality, Division of
Drinking Water regulations require that bacteriological samples are to be collected according to
a written sample siting plan. This plan is to ensure that collection sites are representative of
water throughout the distribution system. Samples will be collected from areas used by all
customers and will include the following:
 Residential areas
 Dead end lines
 Low use area
 Commercial area
 Areas near storage tanks
Sampling sites will be distributed to ensure that no area served by the system is neglected
during the year. The justification for selecting sampling sites is to aid our operators in
understanding the bacteriological quality of the water throughout the system and to monitor
and evaluate the quality of water consumed by all the users of the system.
General System Information
System Name and Address:

Milford City Water System
405 South Main
Milford, UT 84751

The PWSID number for this system is UTAH01003

Dates of Operation: January 1st--December 31st

Estimated Population served by the system is 1381

Estimated Connections: Residential: 578
Commercial: 63

System Manager: Makayla Bealer, City Administrator
[e-mail]
435-387-2717
**Responsible for updating the plan

System Operator: Benjamin Stewart, City Foreman
[e-mail]
435-463-9568
**Responsible for collecting samples
Number of Samples Required
The number of samples to be taken by Milford City is determined by Utah Department of
Environmental Quality, Division of Drinking Water. As defined in the “Monitoring and Water
Quality: Distribution System Requirement” section R309-210-5.
The population served by Milford City Water System is determined to be 1381. The number of
samples is based on section R309-210-5; therefore Milford City Water System is required to
collect two (2) microbiological sample per month.
Routine samples: Presently, based on a population served of approximately 1381, Milford City
Water System is required to take two (2) routine samples each month. Our system can take the
required number of samples, or more than what is required. The number of samples our system
will take is two (2) each month.
Repeat samples: If a routine bacteriological sample is total coliform-positive, the number of
repeat samples required is three (3). The system must collect at least one repeat sample from
the sampling tap where the original total coliform-positive sample was taken, and at least one
repeat sample at a tap within five service connections upstream and at least one repeat sample
at a tap within five service connections downstream of the original sampling site. A set of three
(3) repeat samples will be collected for each positive sample. The repeat sampling procedure
will continue until all samples are total coliform negative or a treatment technique trigger has
been excuted.
The number of routine samples required the month following a total coliform-positive sample is
two (2).
The person(s) responsible for reporting to the Division of Drinking Water is:
System Operator: Benjamin Stewart, City Foreman
[e-mail]
435-463-9568

***The Division of Drinking Water can be contacted at the following numbers:

Utah Department of Environmental Quality
Drinking Water
PO Box 144830
Salt Lake City, UT 84114-4830
Phone: [phone]
Fax: [phone]

Selected Sampling Sites
The Public Water System will collect two (2) routine sample per month. The System has been divided
into two (2) sampling zones. The two (2) samples will be taken from each sampling zone each month.
Sampling sites from each zone will be alternated each month to ensure all areas of the system are
represented during the course of a year.
Milford City has determined the following locations as sampling sites:
# Location Address Zone
1 Milford Public Library 400 South 100 West 1
2 Residential Home 473 South 500 West 1
3 Milford City Office 405 South Main 1
4 Residential Home 179 North 300 West 2
5 Residential Home 101 North 100 West 2
6 Residential Home 66 South 400 West 2

Sample Site Map

Distribution Map

Sampling Procedure
1. Review the sample siting plan to determine where and when samples are to be taken.
2. After arriving at the sampling site, remove any attachments on the faucet.
3. Consider the use of a sodium hypochlorite spray solution or flaming to disinfect the faucet. Flaming
should not be used on plastic faucets.
4. Turn the water on and let it run for several minutes until temperature stabilizes.
• Flush out the customer lines, and
• Ensure that the water being sampled is from the distribution lines, not the plumbing fixture. (A
thermometer can be used to determine when water is being drawn from the distribution system
and not the plumbing fixture. The water temperature will stabilize once all the water from the
fixture has been flushed out and the water flowing from the faucet is coming from the
distribution system.)
5. Adjust the flow from the faucet to a slow, steady stream.
6. Take a sample of water flowing from the tap and determine and document the free chlorine residual.
7. Open the laboratory supplied container used to take the bacteriological sample. Consider using latex
gloves to prevent contamination.
8. Do not touch the inside of the bottle or lid.
9. Do not set the lid down.
10. Do not rinse the bottle out.
11. Grasp the container near the bottom and quickly place it under the flowing stream.
12. Fill the bottle to the neck or indicated fill line. Do not overfill. Collect at least 100 mL of water, this is
the volume the laboratory must have for testing.
13. Remove the sample container from the flow as soon as it is filled. SEAL THE CONTAINER
IMMEDIATELY.
14. Turn off the water and replace any fixtures or attachments that were removed previously.
15. Fill out the bacteriological sample slip.
16. Place the container and completed forms in the shipping box.
17. Insure that the sample is delivered to the laboratory in a timely manner. Analysis must be initiated
with within 30 hours from the time sample is collected.
18. Record sampling event and information in the bacteriological sampling log.

Bacteriological Sample Slip

Bacteriological Sample Log

Actions to be taken if Sample is Total Coliform Positive
Should one of the routine samples be total coliform-positive, we are required to take a set of three (3)
repeat samples. The set of repeat samples will be taken as follows:
• At least one of the repeat samples must be taken from the sampling tap where the original total
coliform-positive samples was taken;
• At least one of the repeat samples must be taken at a tap within 5 service connections downstream
from the original sampling site;
• At least one of the repeat samples must be taken at a tap within 5 service connections upstream from
the original sampling site;
• The complete set of repeat samples must be taken within 24 hours of the system being notified of a
positive coliform result, or when instructed to sample by the Division of Drinking Water;
• The entire set of repeat samples must be taken on the same day.
• If a total coliform-positive sample is at the end of the distribution system, or one service connection
away from the end of the distribution system, the system must still take all required repeat samples.
However, the State may allow an alternative sampling location in lieu of the requirement to collect at
least one repeat sample upstream or downstream of the original sampling site. The State will be
contacted in the event this scenario occurs. Should one of the repeat samples be positive, another set
must be taken. Repeat samples must be taken until:
• Total coliforms are not detected in one complete set of repeat samples, or
• The system exceeds the total coliform treatment technique trigger during the month and notifies the
Department of Environmental Quality, Division of Drinking Water.
• If any routine or repeat sample is E.coli positive, the system must notify the state by the end of the day
when the system is notified of the result.

Sampling During Weekends and Holidays
Routine samples should be taken on Mondays and Tuesdays to avoid a problem with repeat samples.
This should allow ample time for repeat samples to be collected before the weekend if they are
required. If a holiday should occur, which could cause a problem with either routine or repeat sampling
being submitted to the state laboratory, samples must be taken to the Southern Utah University
laboratory for analysis. Planning ahead, and following these guidelines, should avoid any sampling
problems associated with weekends or holidays. Should it not be possible to collect repeat samples and
submit them for analysis within the required 24-hour period because of a holiday or weekend, the
system will provide for a “boil water notice” to be issued until sufficient samples can be collected and
analyzed to verify that the contamination has been eliminated.