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Information for Water System

LAS VEGAS VALLEY WATER DISTRICT

    EPA Water Regions
    PWS Number NV0000090
    Address 1001 SOUTH VALLEY VIEW BLVD
    City LAS VEGAS
    State NV
    ZIP 89153
    Phone 702-870-2011
    Region 9
    Population Served 1,276,091
    Water Source PURCHASED SURFACE WA

    Consumer Confidence Report (CCR) Contents

    U.S. Environmental Protection Agency (EPA) requires most community water systems to provide customers with an annual water quality report. Also known as Consumer Confidence Reports or CCRs, these reports provide residents with detailed information about the quality of their drinking water supply during the past year. The reports are due by the by the subsequent July.

    Each CCR is required to contain the following information about the community's drinking water supply:

    • The source of the water. Possible sources may include wells, rivers, lakes and reservoirs.
    • The levels of any contaminants found in the local drinking water. These may be reported as an average level or as a range.
    • The likely source of any detected contaminants and the susceptibility of a water supply to potential contamination.
    • The EPA maximum contaminant levels (MCL). These are the levels at which certain contaminants are considered to be potentially harmful.
    • Any violation of drinking water-related rules, including a violation of the MCL in which a contaminant exceeds the allowable limit. The report must also include an explanation of the water system's actions to restore safe drinking water.
    • An educational statement regarding Cryptosporidium and the need for certain vulnerable populations to avoid exposure to these organisms. Cryptosporidium is a microscopic parasite that causes the diarrheal disease cryptosporidiosis.

Interpreting the Results of Your Report
Water quality reports (CCR) contain several columns of information. The significant columns to review include:

  • Contaminant or parameter name — Refers to the particular substance being analyzed for in the water, such as lead.
  • Unit — Refers to the unit of measurement in which a particular contaminant is being reported, such as parts per million (ppm).
  • MCLG — Maximum contaminant level goal. Indicates the level of a contaminant in drinking water below which there is no known or expected risk to health.
  • MCL — Maximum contaminant level. Indicates the highest level of contaminant allowed in drinking water.
  • Amount detected — The level at which the contaminant was detected in your water supply. The amount will be reported either as an average for the year or as a range.
  • Violation — A yes in this column indicates your community had a contaminant present in the water that exceeded an MCL.
  • Source — This column indicates the potential source of a particular contaminant, such as naturally present, an additive or the result of contamination from a particular form of business.
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Key Contaminants Reported in CCR
Typical Source in Drinking Water

Fluoride

Water additive which promotes strong teeth.
Nitrate [as Nitrogen] Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits.
Lead & Copper  
Copper
Corrosion of household plumbing systems.
Lead
Corrosion of household plumbing systems.
Organic Contaminants  
TT HMs [Total trihalomethanes] By-product of drinking water chlorination.
HAA [Haloacetic Acids] By-product of drinking water chlorination.
Disinfectant  
Chlorine
Water additive used to control microbes.
Microbiological Contaminants  
TT =95% of samples <= 0.3 Turbidity ** Soil runoff.
<= 5% of samples per month Total Coliform Bacteria Naturally present in the environment.
** A measure of the cloudiness of the water that serves as a good indicator of the effectiveness of the water treatment process.
Abbreviations and Notes
MCL EPA Maximum Contaminant Level
Drinking Water Test Kit
MRDL EPA Maximum Residual Disinfectant Level
NTU Nephelometric Turbidity Units
mg/L Milligrams per liter, or parts per million
TT Treatment Technique
µg/L Micrograms per liter, or parts per billion,



 


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