DDW-2024-014274

Annual Drinking Water Quality Report
Zion Canyon ~ 2020

We're pleased to present to you this year's Annual Drinking Water Quality Report. This report is designed to inform you about the quality of the water and services we deliver to
you every day. Our constant goal is to provide you with a safe and dependable supply of drinking water. We want you to understand the efforts we make to continually improve the water
treatment process and protect our water resources. We are committed to ensuring the quality of your water. Our water sources are Birch Springs, Water Cress Spring, Lower Grotto Spring,
and Upper Grotto Spring.

If you have any questions about this report or concerning your water utility, please contact Treacy Stone at 435-772-0200. We want our valued customers to be informed about their
water utility.

The Drinking Water Source Protection Plan for Zion Canyon is available for your review. It contains information about source protection zones, potential contamination sources and
management strategies to protect our drinking water. We have also developed management strategies to further protect our sources from contamination. Please contact us if you have questions
or concerns about our source protection plan.

There are many connections to our water distribution system. When they are properly installed and maintained, the concerns are very minimal. However, unapproved and improper piping
changes or connections can adversely affect not only the availability, but also the quality, of the water. A cross connection may let polluted water or even chemicals mingle into the
water supply system when not properly protected. This not only compromises the water quality but can also affect your health. So, what can we do? Do not make or allow improper connections
at your homes. Even that unprotected garden hose lying in the puddle next to the driveway is a cross connection. The unprotected lawn sprinkler system after you have fertilized or
sprayed is also a cross connection. When the cross connection is allowed to exist at your home it will affect you and your family first. If you’d like to learn more about helping to
protect the quality of our water, call us for further information about ways you can help.

I'm pleased to report that our drinking water meets federal and state requirements.

Zion Canyon routinely monitors for constituents in our drinking water in accordance with the Federal and Utah State laws. The following table shows the results of our monitoring
for the period of January 1st to December 31st, 2020. All drinking water, including bottled drinking water, may be reasonably expected to contain at least small amounts of some constituents.
It's important to remember that the presence of these constituents does not necessarily pose a health risk.

In the following table you will find many terms and abbreviations you might not be familiar with. To help you better understand these terms we've provided the following definitions:
Parts per million (ppm) or Milligrams per liter (mg/l) - one part per million corresponds to one minute in two years or a single penny in $10,000.
Parts per billion (ppb) or Micrograms per liter (ug/l) - one part per billion corresponds to one minute in 2,000 years, or a single penny in $10,000,000.
Nephelometric Turbidity Unit (NTU) - nephelometric turbidity unit is a measure of the clarity of water. Turbidity in excess of 5 NTU is just noticeable to the average person.
Action Level (AL) - the concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
Treatment Technique (TT) - A treatment technique is a required process intended to reduce the level of a contaminant in drinking water.
Maximum Contaminant Level (MCL) - The “Maximum Allowed” (MCL) is the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible
using the best available treatment technology.
Maximum Contaminant Level Goal (MCLG) - The “Goal”(MCLG) is the level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a
margin of safety.

TEST RESULTS Contaminant Violation
Y/N Level
Detected
ND/Low-High Unit
Measurement MCLG MCL Date Sampled Likely Source of Contamination Microbiological Contaminants Total Coliform Bacteria N ND N/A 0 Presence of coliform
bacteria in 5% of monthly samples 2020 Naturally present in the environment Fecal coliform and E.coli N N/A N/A 0 If a routine sample and repeat sample are total coliform
positive, and one is also fecal coliform or E. coli positive 2020 Human and animal fecal waste Turbidity N 0.09-0.1 NTU 0 0.3 2016 Soil runoff Inorganic Contaminates Arsenic N 1.1-1.2 ppm 0 10 2019 Erosion
of natural deposits, orchards; runoff from glass/electronics production. Barium N 0.208-0.474 Ppm 2 2 2019 Discharge of drilling wastes; discharge from metal refineries; erosion of
natural deposits Copper
90% results
# of sites that exceed the AL N a. 0.033
b.0 ppm 1.3 AL=1.3 2018 Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Lead
a. 90% results
b. # of sites that exceed the AL N a. 1.91

b.0 ppb 0 15 2018 Corrosion of household plumbing systems, erosion of natural deposits Nitrate (as Nitrogen) N 0.13-0.227 ppm 10 10 2020 Runoff from fertilizer use; leaching from septic
tanks, sewage; erosion of natural deposits Selenium N 1.5 ppb 50 50 2019 Discharge from petroleum and metal refineries; erosion of natural deposits; discharge from mines Sodium N 3.4
– 5.4 ppm None set by EPA None set by EPA 2019 Erosion of natural deposits; discharge from refineries and factories; runoff from landfills. Sulfate N 2.856 – 3 ppm 1000 1000 2019 Erosion
of natural deposits; discharge from refineries and factories; runoff from landfills, runoff from cropland TDS (Total Dissolved Solids N 92 – 104 ppm 500 None set by EPA 2019 Erosion
of natural deposits Radioactive Contaminants Alpha emitters N ND-1.6 pCi/1 0 15 2019 Erosion of natural deposits Radium 226 N 0.18-0.37 pCi/l 0 5 2020 Erosion of natural deposits Radium

228 N 0.06-0.47 pCi/1 0 5 2020 Erosion of natural deposits Disinfection By-Products TTHM [Total trihalomethanes] N 0.65-0.666 ppb 0 80 2020 By-product
of drinking water disinfection Chlorine N 0.65 – 0.67 ppm 4 4 2019 Water additive used to control microbes
If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components
associated with service lines and home plumbing. Zion Canyon Water System is responsible for providing high quality drinking water, but cannot control the variety of materials used in
plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to 2 minutes before using
water for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing methods, and steps
you can take to minimize exposure is available from the safe Drinking Water Hotline or at http://www.epa.gov/safewater/lead.

All sources of drinking water are subject to potential contamination by constituents that are naturally occurring or are man-made. Those constituents can be microbes, organic or
inorganic chemicals, or radioactive materials. All drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence
of contaminants does not necessarily indicate that the water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental
Protection Agency’s Safe Drinking Water Hotline at 1-800-426-4791.

Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy,
persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people
should seek advice about drinking water from their health care providers. EPA/CDC guidelines on appropriate means to lessen the risk of infection by cryptosporidium and other microbiological
contaminants are available from the Safe Drinking Water Hotline [phone]).

We at Zion Canyon work around the clock to provide top quality water to every tap. We ask that all our customers help us protect our water sources, which are the heart of our community,
our way of life and our children’s future.

June 19, 2020

Colt Smith
CCR Compliance
Division of Drinking Water
P.O. Box 144830
Salt Lake City, Utah 84114-4830

Dear Mr. Smith:

Subject: Consumer Confidence Report for Zion Canyon (27051).

Enclosed is a copy of Zion Canyon Consumer Confidence Report. It contains the water quality information for our water system for the calendar year 2020 or the most recent sample data.

We have delivered this report to our customers by:

E-mailing it directly to each resident customer and direct mailing to non-resident customers. We have also posted a notice of the availability of the report in local post offices. We
will send a copy to those that request a copy and allow inspection of the report at the Maintenance Division office.

If you have any questions, please contact me at 435-772-0200.

Sincerely,

Treacy Stone
Zion Canyon

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