DDW-2024-013911

PWS ID#: 18011
Presented By
Este es informe valioso sobre su agua potable, si usted desea este información
en español nuestra oficina dispone del personal para atenderle.
Questions?For more information about
this report, or for any questions
relating to your drinking water, please call John Lawson,
Operations Specialist, at [phone].
Community Participation
You are invited to attend out monthly board of trustees
meetings. We generally meet the second Tuesday of each
month at 5:30 p.m. at the Kearns Improvement District office,
5350 West 5400 South, Kearns.
Where Does My Water Come From?
The Kearns Improvement District buys 94 percent of the
water delivered to our customers from the Jordan Valley
Water Conservancy District (JVWCD), our wholesale water
provider. Water sources include Deer Creek Reservoir and
local mountain springs and wells. The water is treated at the
Jordan Valley Water Treatment Plant, the Southeast Regional
Water Treatment Plant, and the Southwest Groundwater
Treatment Plant. The remaining 6 percent of the water is
delivered through 12 wells located in the Kearns area. Kearns
Improvement District staff operate and maintain these wells.
Source Water Assessment
A water source protection plan is now available at our office.
This plan is an assessment of the delineated area around
our listed sources through which contaminants, if present,
could migrate and reach our source water. It also includes
an inventory of potential sources of contamination within
the delineated area and a determination of the water supply’s
susceptibility to contamination by the identified potential
sources. Kearns Improvement District sources have a low to
moderate susceptibility to contaminants.
JVWCD has a drinking water source protection plan available
for review. Please call [phone] if you have any
questions or would like to review the plan. JVWCD sources
have a low to moderate susceptibility to contaminants.
Failure in Flint
The national news coverage of water conditions in Flint,
Michigan, has created a great deal of confusion and con-
sternation. The water there has been described as being corro-
sive; images of corroded batteries and warning labels on bottles
of acids come to mind. But is corrosive water bad?
Corrosive water can be defined as a condition of water quality
that will dissolve metals (iron, lead, copper, etc.) from metallic
plumbing at an excessive rate. There are a few contributing
factors, but generally speaking, corrosive water has a pH of
less than 7; the lower the pH, the more acidic, or corrosive, the
water becomes. (By this definition, many natural waterways
throughout the country can be described as corrosive.) While
all plumbing will be somewhat affected over time by the water
it carries, corrosive water will damage plumbing much more
rapidly than water with low corrosivity.
By itself, corrosive water is not a health concern; your morning
glass of orange juice is considerably more corrosive than the
typical lake or river. What is of concern is that exposure
in drinking water to elevated levels of the dissolved metals
increases adverse health risks. And therein lies the problem.
Public water systems are required to maintain their water at
optimal conditions to prevent it from reaching corrosive levels.
Rest assured that we routinely monitor our water to make sure
that what happened in Flint never happens here.
Quality First
Once again, we are pleased to present our annual water quality report covering all testing performed
between January 1 and December 31, 2020. As in years past, we are committed to delivering the best-
quality drinking water possible. To that end, we remain vigilant in meeting the challenges of new regulations,
source water protection, water conservation, and community outreach and education while continuing to serve
the needs of all our water users. Thank you for allowing us the opportunity to serve you and your family.
We encourage you to share your thoughts with us on the information contained in this report. After all, well-informed customers are our best allies.
Important Health Information
Some people may be more vulnerable to contami-
nants in drinking water than the general population.
Immunocompromised 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 may be par-
ticularly at risk from infections. These people should seek
advice about drinking water from their
health care providers. The U.S. EPA/
CDC (Centers for Disease Control and
Prevention) guidelines on appropriate
means to lessen the risk of infection by
Cryptosporidium and other microbial
contaminants are available from the
Safe Drinking Water Hotline at
[phone] or http://water.
epa.gov/drink/hotline.
How Long Can I Store Drinking Water?
The disinfectant in drinking water will eventually dissipate, even in a closed container. If that container housed bacteria
prior to filling up with the tap water, the bacteria may con-tinue to grow once the disinfectant has dissipated. Some experts
believe that water can be stored up to six months before needing to be replaced. Refrigeration will help slow the bacterial growth.
Lead in Home Plumbing
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 materi-
als and components associated with service lines and home
plumbing. We are responsible for providing
high-quality drinking water, but we can-
not 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 two
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 at [phone] or at www.
epa.gov/safewater/lead.
To the Last Drop
The National Oceanic and Atmospheric Administration
(NOAA) defines drought as a deficiency in precipitation
over an extended period of time, usually a season or more,
resulting in a water shortage causing adverse impacts on veg-
etation, animals, and people. Drought strikes in virtually all
climate zones, from very wet to very dry.
There are primarily three types of drought:
meteorological drought refers to the lack of precipitation, or the degree of dryness and
the duration of the dry period; agricultural drought refers to the agricultural impact of
drought, focusing on precipitation shortages, soil water deficits, and reduced groundwater
or reservoir levels needed for irrigation; and hydrological drought usually occurs following periods of
extended precipitation shortfalls that can impact water supply (i.e., stream flow, reservoir and lake levels, groundwater).
Drought is a temporary aberration from normal climate
conditions; thus, it can vary significantly from one region to
another. Although drought is a normal occurrence, human
factors such as water demand can exacerbate the duration
and impact that drought has on a region. By following simple
water conservation measures, you can help significantly reduce
the lasting effects of extended drought.
Count on Us
Delivering high-quality drinking water to our custom-
ers involves far more than just pushing water through
pipes. Water treatment is a complex, time-consuming process.
Because tap water is highly regulated by state and federal laws,
water treatment plant and system operators must be licensed
and are required to commit to long-term, on-the-job training
before becoming fully qualified. Our licensed water profes-
sionals have a basic understanding of a wide range of subjects,
including mathematics, biology, chemistry, and physics. Some
of the tasks they complete on a regular basis include:
• Operating and maintaining equipment to purify and
clarify water;
• Monitoring and inspecting machinery, meters, gauges,
and operating conditions;
• Conducting tests and inspections on water and evaluating the results;
• Maintaining optimal water chemistry;
• Applying data to formulas that determine treatment requirements, flow levels, and concentration levels;
• Documenting and reporting test results and system
operations to regulatory agencies; and
• Serving our community through customer support,
education, and outreach.
So, the next time you turn on your faucet, think of the skilled
professionals who stand behind each drop.
What’s a Cross-Connection?
Cross-connections that contaminate drinking water distri-
bution lines are a major concern. A cross-connection is
formed at any point where a drinking water line connects to
equipment (boilers), systems containing chemicals (air-con-
ditioning systems, fire sprinkler systems, irrigation systems),
or water sources of questionable quality. Cross-connection
contamination can occur when the pressure in the equipment
or system is greater than the pressure inside the drinking water
line (back pressure). Contamination can also occur when the
pressure in the drinking water line drops due to fairly routine
occurrences (main breaks, heavy water demand), causing con-
taminants to be sucked out from the equipment and into the
drinking water line (back siphonage).
Outside water taps and garden hoses tend to be the most common sources of cross-connection contamination at
home. The garden hose creates a hazard when submerged in a swimming pool or attached to a chemical sprayer for weed
killing. Garden hoses that are left lying on the ground may be contaminated by fertilizers, cesspools, or garden chemicals.
Improperly installed valves in your toilet could also be a source of cross-connection contamination.
Community water supplies are continuously jeopardized
by cross-connections unless appropriate valves, known as
backflow prevention devices, are installed and maintained.
We have surveyed industrial, commercial, and institutional
facilities in the service area to make sure that potential
cross-connections are identified and eliminated or protected
by a backflow preventer. We also inspect and test backflow
preventers to make sure that they provide maximum
protection.
For more information on backflow prevention, contact the Safe Drinking Water Hotline at [phone].
We remain vigilant in delivering the best-quality
drinking water
Substances That Could Be in Water
To ensure that tap water is safe to drink, the U.S. EPA prescribes regulations limiting the amount of certain contaminants in water provided by
public water systems. U.S. Food and Drug Administration regulations establish limits for contaminants in bottled water, which must provide the same protection for public health. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some
contaminants. The presence of these contaminants does not necessarily indicate that the water poses a health risk.
The sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels
over the surface of the land or through the ground, it dissolves naturally occurring minerals, in some cases radioactive material, and substances
resulting from the presence of animals or from human activity. Substances that may be present in source water include:
Microbial Contaminants, such as viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock
operations, or wildlife;
Inorganic Contaminants, such as salts and metals, which can be naturally occurring or may result from urban stormwater runoff, industrial or
domestic wastewater discharges, oil and gas production, mining, or farming;
Pesticides and Herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses;
Organic Chemical Contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum
production and may also come from gas stations, urban stormwater runoff, and septic systems;
Radioactive Contaminants, which can be naturally occurring or may be the result of oil and gas production and mining activities.
For more information about contaminants and potential health effects, call the U.S. EPA’s Safe Drinking Water Hotline at [phone].
What type of container is best for storing water?
Consumer Reports has consistently advised that glass or BPA-free plastics such as polyethylene are the safest choices. To be on
the safe side, don’t use any container with markings on the recycle symbol showing “7 PC” (that’s code for BPA). You could
also consider using stainless steel or aluminum with BPA-free liners.
How much emergency water should I keep?
Typically, one gallon per person per day is recommended. For a family of four, that would be 12 gallons for three days.
Humans can survive without food for one month but can only survive one week without water.
How long does it take a water supplier to produce one glass of drinking water?It can take up to 45 minutes to produce a single glass of drinking water.
How many community water systems are there in the U.S.?
About 53,000 public water systems across the United States process 34 billion gallons of water per day for home and
commercial use. Eighty-five percent of the population is served by these systems.
Which household activity wastes the most water?Most people would say the majority of water use comes from showering or washing dishes; however, toilet flushing is by far
the largest single use of water in a home (accounting for 40 percent of total water use). Toilets use about 4 to 6 gallons per flush, so consider an ultra-low-flow (ULF) toilet, which requires only 1.5 gallons.
Test Results
We are pleased to report that your drinking water meets or exceeds all federal and state requirements.
Our water is monitored for many different kinds of substances on a very strict sampling schedule, and the water we deliver must meet specific health standards. Here, we only show those substances that were detected in our water (a complete list of all our analytical results is available upon
request). Remember that detecting a substance does not mean the water is unsafe to drink; our goal is to keep all detects below their respective maximum allowed levels.
The state recommends monitoring for certain substances less than once per year because the concentrations of these substances do not change frequently.
In these cases, the most recent sample data are included, along with the year in which the sample was taken.
We participated in the fourth stage of the U.S. EPA’s Unregulated Contaminant Monitoring Rule (UCMR4) program by performing additional tests on our drinking water.
UCMR4 sampling benefits the environment and public health by providing the U.S. EPA with data on the occurrence of contaminants suspected to be in drinking water in order to determine if U.S. EPA needs to introduce new regulatory standards to improve drinking water quality. Unregulated contaminant monitoring data are available to the public,
so please feel free to contact us if you are interested in obtaining that information. If you would like more information on the U.S. EPA’s Unregulated Contaminant Monitoring Rule, please call the Safe Drinking Water Hotline at [phone].
Definitions
90th %ile: The levels reported for lead and copper represent the 90th percentile of the total number of sites tested. The 90th percentile is equal to or greater than 90% of our lead and copper detections.
AL (Action Level): The concentration of a
contaminant which, if exceeded, triggers treatment
or other requirements which a water system must
follow.
MCL (Maximum Contaminant Level): 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.
MCLG (Maximum Contaminant Level Goal): 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.
MRDL (Maximum Residual Disinfectant Level):
The highest level of a disinfectant allowed in
drinking water. There is convincing evidence that
addition of a disinfectant is necessary for control of
microbial contaminants.
MRDLG (Maximum Residual Disinfectant Level
Goal): The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
NA: Not applicable
ND (Not detected): Indicates that the substance
was not found by laboratory analysis.
NTU (Nephelometric Turbidity Units): Measurement of the clarity, or turbidity, of water. Turbidity in excess of 5 NTU is just noticeable to the average person.
pCi/L (picocuries per liter): A measure of
radioactivity.
ppb (parts per billion): One part substance per billion parts water (or micrograms per liter).
ppm (parts per million): One part substance per
million parts water (or milligrams per liter).
ppt (parts per trillion): One part substance per trillion parts water (or nanograms per liter).
SMCL (Secondary Maximum Contaminant
Level): These standards are developed to protect
aesthetic qualities of drinking water and are not
health based.
TT (Treatment Technique): A required process intended to reduce the level of a contaminant in drinking water.
µmho/cm (micromhos per centimeter): A unit
expressing the amount of electrical conductivity of
a solution.
REGULATED SUBSTANCES
Kearns Improvement District Jordan Valley Water Conservancy District
SUBSTANCE(UNIT OF MEASURE)YEARSAMPLED MCL[MRDL]MCLG[MRDLG]AMOUNTDETECTED RANGELOW-HIGH
AMOUNTDETECTED RANGELOW-HIGH VIOLATION TYPICAL SOURCE
Alpha Emitters (pCi/L)2019 15 0 0.08 0.08–0.1 14.01 0.7–14.01 No Erosion of natural deposits
Arsenic (ppb)2020 10 0 4.0 1.0–4.0 2.1 ND–2.1 No Erosion of natural deposits; Runoff from orchards; Runoff from glass and electronics production wastes
Barium (ppm)2019 2 2 0.096 0.060–0.096 0.00111 ND–0.00111 No Discharge of drilling wastes; Discharge from metal refineries;
Erosion of natural deposits
Beta/Photon Emitters (pCi/L)2019 502 0 3.2 2.7–3.2 32.01 1.2–32.01 No Decay of natural and human-made deposits
Chlorine (ppm)2020 [4][4]0.96 0.03–0.96 1.3 ND–1.3 No Water additive used to control microbes
Chlorine Dioxide (ppb)2020 [800][800]NA NA 0.1 ND–0.1 No Water additive used to control microbes
Chlorite (ppm)2020 1 0.8 NA NA 0.9 ND–0.9 No By-product of drinking water disinfection
Combined Radium (pCi/L)2016 5 0 1.4 0.12–1.4 NA NA No Decay of natural and human-made deposits
Cyanide (ppb)2019 200 200 0.002 NA 3.01 ND–3.01 No Discharge from steel/metal factories; Discharge from plastic and
fertilizer factories
Fluoride (ppm)2020 4 4 0.96 0.05–0.96 0.9 0.2–0.9 No Erosion of natural deposits; Water additive which promotes strong
teeth; Discharge from fertilizer and aluminum factories
Haloacetic Acids [HAAs] (ppb)2020 60 NA 36.7 4.07–36.7 50.8 ND–50.8 No By-product of drinking water disinfection
Nitrate (ppm)2020 10 10 3.98 0.203–3.98 2.8 ND–2.8 No Runoff from fertilizer use; Leaching from septic tanks, sewage;
Erosion of natural deposits
Nitrite (ppm)2020 1 1 NA NA 1.0 ND–1.0 No Runoff from fertilizer use; Leaching from septic tanks, sewage;
Erosion of natural deposits
Selenium (ppb)2019 50 50 3.6 ND–3.6 2.41 ND–2.41 No Discharge from petroleum and metal refineries; Erosion of natural
deposits; Discharge from mines
Tetrachloroethylene (ppb)2016 5 0 1.0 NA NA NA No Discharge from factories and dry cleaners
Total Organic Carbon3 (ppm)2016 TT NA 1.8 1.5–1.8 3.11 ND–3.11 No Naturally present in the environment
TTHMs [Total
Trihalomethanes] (ppb)
2020 80 NA 64.1 8.50–64.1 67.4 ND–67.4 No By-product of drinking water disinfection
Turbidity4 (NTU)2019 TT NA 0.31 0.05–0.31 0.81 0.1–0.81 No Soil runoff
Turbidity (lowest monthly percent of samples meeting limit)
2020 TT = 95% of samples meet the limit
NA NA NA 100 NA No Soil runoff
Uranium (ppb)2020 30 0 NA NA 10.1 ND–10.1 No Erosion of natural deposits
Tap water samples were collected for lead and copper analyses from sample sites throughout the community
Kearns Improvement District Jordan Valley Water Conservancy District
SUBSTANCE(UNIT OF MEASURE)YEARSAMPLED AL MCLG
AMOUNT DETECTED (90TH %ILE)
SITES ABOVE AL/TOTAL SITES
AMOUNT DETECTED (90TH %ILE)
SITES ABOVE AL/TOTAL SITES VIOLATION TYPICAL SOURCE
Copper (ppm)2019 1.3 1.3 0.195 0/30 0.31 0/30 No Corrosion of household plumbing systems; Erosion of natural deposits
Lead (ppb)2019 15 0 1.9 0/30 4.7 1/30 No Corrosion of household plumbing systems; Erosion of natural deposits
OTHER REGULATED SUBSTANCES
Kearns Improvement District Jordan Valley Water Conservancy District
SUBSTANCE(UNIT OF MEASURE)YEARSAMPLED MCL[MRDL]MCLG[MRDLG]AMOUNTDETECTED RANGELOW-HIGH
AMOUNTDETECTED RANGELOW-HIGH VIOLATION TYPICAL SOURCE
Copper (ppb)2020 NE NE NA NA 125.0 ND–125.0 No Erosion of naturally occurring deposits
Giardia5 (cysts/L)2017 TT 0.0 NA NA 7.0 ND–7.0 No Parasite that enters lakes and rivers through sewage and animal waste
Lead (ppb)2020 NE NE NA NA 1.4 ND–1.4 No Erosion of naturally occurring deposits
Radium 226 (pCi/L)2020 NE NE NA NA 1.3 0.5–1.3 No Decay of natural and human-made deposits
Radium 228 (pCi/L)2019 NE NE 0.32 0.32–0.45 0.51 0.3–0.51 No Naturally occurring
Total Dissolved Solids
[TDS] (ppm)2019 1,000 NA 740 260–740 6521 52–6521 No Runoff/leaching from natural deposits
Turbidity [Groundwater
source] (NTU)
2020 5.0 NE NA NA 0.7 ND–0.7 No Suspended material from soil runoff; MCL is 5.0 NTU for groundwater
Turbidity [Surface water
source] (NTU)
2020 0.3 TT NA NA 0.3 ND–0.3 No Suspended material from soil runoff; MCL is 0.3 NTU 95% of the time for
surface water
SECONDARY SUBSTANCES
Kearns Improvement District Jordan Valley Water Conservancy District
SUBSTANCE(UNIT OF MEASURE)YEARSAMPLED SMCL MCLG AMOUNTDETECTED RANGELOW-HIGH
AMOUNTDETECTED RANGELOW-HIGH VIOLATION TYPICAL SOURCE
Aluminum (ppb)2020 200 NA NA NA 13.1 ND–13.1 No Erosion of natural deposits; Residual from some surface water treatment
processes
Chloride (ppm)2020 250 NA NA NA 161.0 10.0–161.0 No Runoff/leaching from natural deposits
Color (units)2019 15 NA NA NA 10.0 0.5–10.0 No Naturally occurring organic materials
Iron (ppb)2020 300 NA NA NA 187.0 ND–187.0 No Leaching from natural deposits; Industrial wastes
pH (units)2020 6.5–8.5 NA NA NA 8.2 6.7–8.2 No Naturally occurring
Silver (ppb)2020 100 NA NA NA 0.7 NA No Industrial discharges
Sulfate (ppm)2019 250 NA 94 41–94 239.01 9.4–239.01 No Runoff/leaching from natural deposits; Industrial wastes
UNREGULATED SUBSTANCES
Kearns Improvement District Jordan Valley Water Conservancy District
SUBSTANCE(UNIT OF MEASURE)YEARSAMPLED AMOUNTDETECTED RANGELOW-HIGH
AMOUNTDETECTED RANGELOW-HIGH TYPICAL SOURCE
Bromodichloromethane (ppb)2020 13.50 2.51–13.50 14.4 ND–14.4 Disinfection by-products
Bromoform (ppb)2020 10.60 ND–10.60 2.7 ND–2.7 Disinfection by-products
Chloroform (ppb)2020 51.40 ND–51.40 61.6 ND–61.6 Disinfection by-products
Dibromochloromethane (ppb)2020 4.48 1.35–4.48 4.4 ND–4.4 Disinfection by-products
Nickel (ppb)2020 NA NA 3.0 ND–3.0 Naturally occurring
Sodium (ppm)2019 58.6 12.4–58.6 74.21 8.0–74.21 Erosion of natural deposits
OTHER SUBSTANCES
Kearns Improvement District Jordan Valley Water Conservancy District
SUBSTANCE(UNIT OF MEASURE)YEARSAMPLED AMOUNTDETECTED RANGELOW-HIGH
AMOUNTDETECTED RANGELOW-HIGH TYPICAL SOURCE
Alkalinity, Bicarbonate [HCO3]
(ppm)
2020 NA NA 225.0 37.0–225.0 Naturally occurring
Alkalinity, Carbonate (ppm)2019 NA NA 4.0 ND–4.0 Naturally occurring
Alkalinity, CO2 (ppm)2016 NA NA 132.0 28.0–132.0 Naturally occurring
Alkalinity, Total [as CaCO3] (ppm)2020 NA NA 246.0 21.0–246.0 Naturally occurring
Ammonia (ppm)2018 NA NA 0.3 NA Runoff from fertilizer; Naturally occurring
Boron (ppm)2018 NA NA 39.0 NA Erosion of naturally occurring deposits
Bromide (ppb)2020 NA NA 9.4 ND–9.4 Naturally occurring
Bromochloroacetic Acid (ppb)2020 4.2 0.52–4.2 NA NA By-product of drinking water disinfection
Bromodichloroacetic Acid (ppb)2020 3.3 0.83–3.3 NA NA By-product of drinking water disinfection
Calcium, Total (ppm)2020 NA NA 86.6 22.7–86.6 Erosion of naturally occurring deposits
Chlorodibromoacetic Acid (ppb)2020 0.55 0.31–0.55 NA NA By-product of drinking water disinfection
Chromium, Total (ppb)2020 NA NA 7.1 ND–7.1 Discharge from steel and pulp mills; Erosion
of natural deposits
Conductivity (µmho/cm)2020 NA NA 1,100.0 ND–1,100.0 Naturally occurring
Cyanide, Total (ppb)2020 NA NA 2.0 ND–2.0 Discharge from steel/metal factories;
Discharge from plastic and fertilizer factories
Dibromoacetic Acid (ppb)2020 0.89 ND–0.89 NA NA By-product of drinking water disinfection
Dichloroacetic Acid (ppb)2020 21 0.31–21 NA NA By-product of drinking water disinfection
Dissolved Organic Carbon (ppm)2020 NA NA 2.3 1.6–2.3 Naturally occurring
Geosmin (ppt)2020 NA NA 5.9 ND–5.9 Naturally occurring organic compound
associated with musty odor
Gross Alpha Particles (pCi/L)2020 NA NA 14.0 0.7–14.0 Decay of natural and human-made deposits
Gross Beta Particles (pCi/L)2020 NA NA 32.0 1.2–32.0 Decay of natural and human-made deposits
HAA6Br (ppb)2020 NA NA 68.4 33.8–68.4 By-product of drinking water disinfection
Hardness, Calcium (ppm)2020 NA NA 200.0 16.0–200.0 Erosion of naturally occurring deposits
Hardness, Total [as CaCO3] (ppm)2020 NA NA 381.0 43.9–381.0 Erosion of naturally occurring deposits
Magnesium (ppm)2020 NA NA 41.3 6.9–41.3 Erosion of naturally occurring deposits
Manganese (ppb)2020 12 0.47–12 34.0 ND–34.0 Naturally occurring
Molybdenum (ppb)2020 NA NA 2.2 ND–2.2 By-product of copper and tungsten mining
Monobromoacetic Acid (ppb)2020 4.10 ND–4.10 NA NA By-product of drinking water disinfection
Orthophosphates (ppb)2020 NA NA 10.0 ND–10.0 Erosion of naturally occurring deposits
Potassium (ppm)2020 NA NA 3.5 ND–3.5 Erosion of naturally occurring deposits
Total Organic Carbon [TOC]
(ppm)
2020 1.8 1.5–1.8 3.1 ND – 3.1 Naturally occurring.
Total Suspended Solids [TSS]
(ppm)
2020 NA NA 8.0 ND–8.0 Erosion of naturally occurring deposits
Trichloroacetic Acid (ppb)2020 19.50 0.60–19.50 NA NA By-product of drinking water disinfection
Turbidity (NTU)2020 NA NA 0.8 0.1–0.8 Suspended material from soil runoff
UV-254 (1/cm)2020 NA NA 0.04 0.02–0.04 Measure of the concentration of UV-absorbing
organic compounds; Naturally occurring
Vanadium (ppb)2020 NA NA 2.2 ND–2.2 Naturally occurring
1 Sampled in 2020.
2 The MCL for beta particles is 4 mrem/year. U.S. EPA considers 50 pCi/L to be the level of concern for beta particles.
3 The value reported under Amount Detected for TOC is the lowest ratio between percentage of TOC actually removed to the percentage of TOC required to be removed. A value of
greater than one indicates that the water system is in compliance with TOC removal requirements. A value of less than one indicates a violation of the TOC removal requirements.
4 Turbidity is a measure of the cloudiness of the water. It is monitored because it is a good indicator of the effectiveness of the filtration system.
5 All monitoring and results are on raw or pretreated water only.