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Query Results for Utah Drinking Water Contaminants Query Module- Yearly Mean Concentrations of Selected Contaminants in Community Water Systems - Mean Concentrations

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Year Filter: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
Contaminant Filter: Tetrachloroethene (PCE) - micrograms per liter
County - Water system Filter: Beaver - Anderson Meadow Campground, Beaver - Beaver City Water System, Beaver - Beaver High Adventure Base, Beaver - Elk Meadows SSD, Beaver - Greenville Ward, Beaver - Hi-Lo Estates, Beaver - Kents Lake Campground, Beaver - Little Cottonwood Campground, Beaver - Mahogany Cove Campground, Beaver - Manderfield Culinary Water Company, Beaver - Milford City Water System, Beaver - Minersville Water System, Beaver - Ponderosa Picnic Ground, Beaver - Smithfield Hog Rocky Mtn-Blue Mtn North, Beaver - Smithfield Hog Rocky Mtn - Pinnacle, Beaver - Smithfield Hog Rocky Mtn - Skyline, Beaver - Smithfield Hog Rocky Mtn - West Skyline, Beaver - Tusher Campground, Garfield - Antimony Town Water System, Garfield - Blue Spruce Campground, Garfield - Boulder Farmstead Water Co, Garfield - Bryce Canyon National Park, Garfield - Bryce Canyon Pines, Garfield - Cannonville Town Water System, Garfield - Escalante Town Water System, Garfield - Hatch Town Water System, Garfield - Henrieville Town Water System, Garfield - JNB Marine, Garfield - Lonesome Beaver - Dandelion Flat, Garfield - Mcmillan Springs Campground, Garfield - Offshore Marina, Garfield - Panguitch City Water System, Garfield - Panguitch Lake Chapel, Garfield - Panguitch Lodging LLC, Garfield - Paunsaugunt Cliffs SSD, Garfield - Pines Highway Rest Stop, Garfield - Pleasant Creek Campground, Garfield - Quality Inn Bryce, Garfield - Red Canyon Campground, Garfield - Rubys Inn, Garfield - Shooting Star Rv Resort, Garfield - Starr Springs Campground, Garfield - Ticaboo Utility Improvement District, Garfield - Tropic Town Water System, Garfield - Tru North, Garfield - Turn About Ranch, Iron - American Pacific, Iron - Brian Head Town Water System, Iron - Buena Vista Community, Iron - Bumblebee Water System, Iron - Cedar City Waterworks, Iron - Cedar Highlands Subdivision, Iron - Central Iron County WCD, Iron - Chekshani Cliffs Hoa, Iron - Cross Hollow Hills Subdivision, Iron - Enoch City Water System, Iron - Escalante Valley Housing, Iron - Escalante Valley School, Iron - Flying L Subdivision, Iron - Harmony Mtn Ranches, Iron - Irontown, Iron - Kanarraville Town Water System, Iron - Little Thunder Camp, Iron - Meadows Ranch, Iron - Mid Valley Estates, Iron - Monte Vista Community Water Co, Iron - Monuments Academy, Iron - Mountain View SSD, Iron - New Castle Water Company, Iron - Old Meadows Water Co., Iron - Paragonah Town Water System, Iron - Parowan City Water System, Iron - Rainbow Ranchos, Iron - Smithfield Hog Rocky Mtn-Blue Mtn South, Iron - Spring Creek Water Users, Iron - Summit Culinary Water, Iron - Thunder Ridge Scout Camp, Iron - Woods Ranch, Kane - Alton Town Water System, Kane - Best Friends Animal Society, Kane - Bryce-Zion Campground, Kane - Church Wells SSD, Kane - Coral Pink Sand Dunes, Kane - Deer Springs South, Kane - Glen Canyon NRA - Bullfrog, Kane - Glen Canyon NRA - Dangling Rope, Kane - Glen Canyon SSD of Big Water, Kane - Glen Canyon SSD Of Big Water, Kane - Glendale Town Water System, Kane - Grand Staircase Water Company, Kane - Kanab City, Kane - Kane County WCD - Duck Creek Village, Kane - Kane County WCD - Johnson Canyon, Kane - Kane County WCD - Long Valley Estates, Kane - Kodachrome Basin, Kane - New Paria Subdivision, Kane - Orderville Town Water System, Kane - Ranch At Zion, Kane - Zion Frontier Resort, Washington - Angell Springs SSD, Washington - Big Plains Sw SSD - Apple Valley, Washington - Big Plains Sw SSD - Cedar Point, Washington - Camp Kolob - Oak Valley Girl'S Cam, Washington - Camp Kolob - Deer Haven Ranch, Washington - Camp Kolob - Spring Creek, Washington - Central Culinary Water Co, Washington - Dammeron Valley Water Works LLC, Washington - Diamond Valley Acres, Washington - Dixie Deer SSD, Washington - Enterprise Town Water System, Washington - Gunlock Special Service District, Washington - Harmony Farms Water Users, Washington - Harmony Heights, Washington - Harmony Heights Water Company, Washington - Hildale - Colorado City, Washington - Holmstead Ranch LLC, Washington - Homespun Village Water Co, Washington - Hurricane City, Washington - Ivins, Washington - K.W.U. Inc., Washington - La Verkin City Water System, Washington - Leeds Domestic Water Users Associat, Washington - Little Creek Travel Center, Washington - Mountain Springs Water Co, Washington - New Harmony Water System, Washington - North Valley Ranches Sub, Washington - Olympus Academy, Washington - Pine Valley Irrigation Co, Washington - Pine Valley Mt Farms, Washington - Rockville Pipeline Co, Washington - Santa Clara City, Washington - Springdale Town Water System, Washington - St George City Water System, Washington - Three Points Center, Washington - Toquerville Town Water System, Washington - Veyo Culinary Water Assn, Washington - Virgin, Washington - Virgin Sky, Washington - Washington City, Washington - Washington County WCD - Cottam, Washington - Washington County WCD - Kayenta Wat, Washington - Washington County WCD - Kolob Wells, Washington - Washington County WCD - Quail Lake, Washington - Washington County WCD - Sand Hollow, Washington - Winchester Hills Water Co, Washington - Zion Canyon Water System, Washington - Zion NP- Kolob Visitor Center, Washington - Zion NP - East Gate System, Washington - Zion Panorama Subdivision, Washington - Zion Under Canvas
Data Grouped By:Year, County - Water system
Drinking water concentrations are based on samples taken from community water systems. Data from seasonal and emergency sources were not included.

A Public Water System is a system, either publicly or privately owned, providing water through constructed conveyances for human consumption and other domestic uses, which has at least 15 service connections or serves an average of at least 25 individuals daily at least 60 days out of the year and includes collection, treatment, storage, or distribution facilities under the control of the operator and used primarily in connection with the system, or collection, pretreatment, or storage facilities used primarily in connection with the system but not under the operator's control. All public water systems are further categorized into three different types: *Community *Non-transient Non-community *Transient Non-community[[br]] [[br]] This dataset only includes community water systems as defined and regulated by the Safe Drinking Water Act. It does not include Non-Transient Non-Community and Transient Non-Community water systems.

HAA5 and TTHM are considered disinfection byproducts. Disinfection byproducts refer to a family of chemicals that form when disinfectants used in water treatment react with bromide and/or naturally occurring organic matter in water. The Maximum Contaminant Level (MCL) is the highest level of a contaminant that is allowed in drinking water. MCLs are enforceable standards: * The MCL for Uranium is 30 micrograms per liter (ug/L). * The MCL for TTHMs is 80 ug/L. * The MCL for TCE is 5 ug/L. * The MCL for Radium is 5 picoCuries per liter (pCi/L). * The MCL for PCE is 5 ug/L. * The MCL for Nitrate is set at 10 milligrams per liter (mg/L) and the MCL for Nitrite is 1 mg/L. * The MCL for DEHP is 6 ug/L. * The MCL for Atrazine is 3 ug/L. * The MCL for Arsenic is 10 ug/L. * The MCL for HAA5 is 60 ug/L.
  • Division of Drinking Water at the Utah Department of Environmental Quality
Measures do not account for the variability in sampling, numbers of sampling repeats, and variability within systems. Concentrations in drinking water cannot be directly converted to exposure because water consumption varies by climate, level of physical activity, and between people.

Frequency of sampling varies between contaminants. Some samples are taken once a year (surface sources), once every three years (groundwater sources), or once every nine years (for sources with a waiver); therefore, many years of data are missing in this dataset.

Arsenic - Frequency of sampling for arsenic is based on compliance with the MCL; the lower the measured concentration the fewer samples will be taken and some years there may be no sampling for arsenic.

Atrazine - Ground water systems may have many wells with different atrazine concentrations that serve different parts of the population. Compliance samples are taken at each entry point to the distribution system. In systems with separate wells serving some branches or sections of the distribution system, the system mean would tend to underestimate the atrazine concentration of people served by wells with higher atrazine concentrations. Exposure may be higher or lower than estimated if data from multiple entry points for water with different atrazine levels are averaged to estimate levels for the CWS.

DEHP - Ground water systems may have many wells with different DEHP concentrations that serve different parts of the population. Compliance samples are taken at each entry point to the distribution system. In systems with separate wells serving some branches or sections of the distribution system, the system mean would tend to underestimate the DEHP concentration of people served by wells with higher DEHP concentrations. Exposure may be higher or lower than estimated if data from multiple entry points for water with different DEHP levels are averaged to estimate levels for the CWS.

Disinfection Byproducts (DBP) (HAA5 and TTHM) - Water supply systems sample for DBPs on different schedules that range from quarterly to triennially. Different sampling frequencies complicate comparisons among different water supply systems. Long intervals between samples, although allowed only where THM and HAA levels have been found to be well under the MCL, create greater uncertainty about levels between sampling dates and require stronger assumptions when estimating exposure during short term events such as pregnancies. When allowed, annual or triennial monitoring takes place during the month of warmest weather and may therefore overestimate average DBP levels.

Nitrate - Nitrate levels can vary substantially in groundwater; thus high levels may not be captured by even quarterly sampling. Estimates of the number of people potentially exposed may be unreliable as they are based on estimates made by the water system operator. Concentrations in drinking water cannot be directly converted to exposure because overall water consumption, and the proportion of water consumed that comes from the tap is quite variable. In systems that have more than one entry point to the distribution system, the actual nitrate level at any given house is a mixture of the levels from all contributing sources. Compliance samples are taken at each entry point to the distribution system. In systems with separate wells serving some branches or sections of the distribution system, the system mean would tend to underestimate the nitrate concentration of people served by wells with higher nitrate concentrations. Exposure may be higher or lower than estimated if data from multiple entry points for water with different nitrate levels are averaged to estimate levels for the CWS.

The required monitoring frequency for combined Radium-226 and -228 is infrequent; therefore, there are little data on this contaminant.

PCE - Ground water systems may have multiple wells with different PCE concentrations that serve different parts of the population. Compliance samples are taken at each entry point to the distribution system. In systems with separate wells serving some branches or sections of the distribution system, the system mean would tend to underestimate the PCE concentration of people served by wells with higher PCE concentrations. Exposure may be higher or lower than estimated if data from multiple entry points for water with different PCE levels are averaged to estimate levels for the CWS.

Radium The required monitoring frequency for combined Radium-226 and -228 is infrequent; therefore, there are little data on this contaminant.

TCE - Ground water systems may have multiple wells with different TCE concentrations that serve different parts of the population. Compliance samples are taken at each entry point to the distribution system. In systems with separate wells serving some branches or sections of the distribution system, the system mean would tend to underestimate the TCE concentration of people served by wells with higher TCE concentrations. Exposure may be higher or lower than estimated if data from multiple entry points for water with different TCE levels are averaged to estimate levels for the CWS.

Uranium - The required monitoring frequency for Uranium is infrequent; therefore, there are very little data on this contaminant.

Ground water systems may have multiple wells with different Uranium concentrations that serve different parts of the population. Compliance samples are taken at each entry point to the distribution system. In systems with separate wells serving some branches or sections of the distribution system, the system mean would tend to underestimate the Uranium concentrations of people served by wells with higher Uranium concentrations. Exposure may be higher or lower than estimated if data from multiple entry points for water with different Uranium levels are averaged to estimate levels for the CWS.
These data were queried on: Tue, 19 May 2020 15:05:51 MDT

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The information provided above is from the Utah Department of Health's Center for Health Data IBIS-PH web site (http://epht.health.utah.gov). The information published on this website may be reproduced without permission. Please use the following citation: " Retrieved Sat, 31 October 2020 1:43:38 from Utah Department of Health, Center for Health Data, Indicator-Based Information System for Public Health Web site: http://epht.health.utah.gov ".

Content updated: Tue, 5 May 2020 11:03:24 MDT