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Drinking Water Quality : 2000 Test Results PAGE 3 . In 2000, OWASA tested drinking water for over 100 substances in accord with State and Federal requirements , 1 : 3 2 Listed below are the only substances that were detected, all of which were below the regulatory limits. To get a list Joe : rgoo-g-f go - Wgggl! of all test results including substances not detected, please call us at 968-4421 or see our Web site, www. owasa . org. Glossary : Definitions for words and acronyms used below Maximum Contaminant Level Goal (MCLG) - the level of Picocuries per liter (pCYL) - a measure of the radioactivity low a contaminant in drinking water below which there is no in water. (A picocurie is one quadrillionth of a curie . ) known or expected risk to health . MCLGs allow for a margin o. of safety. Nephelometric Turbidity Unit (NTU) - a measure of the clarity of water. Turbidity over 5 NTU is just noticeable to thege Maximum Contaminant Level (MCL) - the highest level of average person , a contaminant that is allowed in drinking water. MCLs are 0 go go go set as close to the MCLGs as feasible using the best avail - Action Level (AL) - the concentration of a contaminant which , able treatment technology. if exceeded , triggers treatment or other requirements which - _ a water system must follow. Parts per million (ppm) - one part per million corresponds We to one minute in two years or a single penny in $ 10 , 000 , Treatment Technique (TT) - a required process intended to o reduce the level of a contaminant in drinking water. we- go gww. - Parts per billion (ppb) - one part per billion corresponds to one minute in 2 , 000 years , or one penny in $ 10 million . Below Detectable Level (BDL) - a concentration that is be- low the level that can be detected with required tests . go Levels and Types of Substances found in 2000 Drinking Water Tests Substance Highest Level Range Maximum Max . Con - Major Sources in , ( unit of measurement) Detected ( ex- Detected Contaminant taminant Drinking Water cept as noted ) Level Level Goalgo Microbiological Substances = Turbidity ( NTU ) 0 . 33 0 . 01 - 0 . 33 TT = 5 n/a Soil runoff All samples 5 0 . 5 . Radiological Substances ' - _ ; ::: .; . Beta/Photon Emitters 4 . 34 no range 50 0 Decay of natural and artifi - o ( pCi/L) ( last tested in 1999) cial deposits googgoogg_ Inorganic Substances Antimony ( ppb ) 0 . 001 BDL to 0 . 001 6 6 Fire retardants ; ceramics ; electronics ; solder ere Barium ( ppm ) 0 . 017 no range 2 2 Erosion of natural deposits - Corrosion of household Copper 90 % of samples Action Level : plumbing systems , erosion ( ppm ) _< 0 . 193 ** ; none 0 . 016 - 1 3 1 . 3 of natural deposits , leaching ( last tested in1999 ) ** F lee above AL . 0 . 339 from wood preservativesgoo Erosion of natural depos- Fluoride 1918 0 . 96 - 1 . 18 4 4 its ; water additive which ( ppm ) promotes strop teethgo ge Lead 90 % of samples Corrosion of householdgo . ono ( ppb) 5 3 * * ; none 3 - 7 Action Level : 0 plumbing systems , eroge go - (last tested in 1999)** above AL . 15 sion of natural deposits Sodium ( ppm ) 22 18 - 22 not regulated Occurs naturally in soils grog Volatile Organic Substances . F go Total Trihalomethanes 64 . 7 41 . 3 - 105 . 0 100 0 By- products of drinking ( ppb ) yearly running avg . *** yearly running avg . *** water chlorination . go - Unregulated Volatile Organic Substances Bromodichloromethane (ppb 7 . 1 Components of Chloroform ( ppb ) 27 . 9 no range trihalomethanes , a by- not regulated product of drinking water Chlorodibromomethane (ppb ) 1 .4 chlorination Ig go Sulfate ( ppm ) 28 20 - 28 Occurs naturally in soilsof *Test required every four years . ** Tests are done in the water distribution system every three years in accord with federal standards . ** * Listed on a 90th percentile or running average basis in accord with federal requirements . i T � . � In February and October of 2000 , we tested for arsenic m go in our drinking water. of go " go The result : arsenic was below the detectable level of 5 parts per billion . q go All drinking water, including bottled drinking water, may be reasonably expected to contain at least small amounts of somego contaminants . The presence of these contaminants does not necessarily pose a health risk . The Environmental Protec- go go tion Agency limits the amount of certain contaminants in water from public drinking water systems . The Food and Drug Administration sets limits for contaminants in bottled water to provide the same protection for the public health . 4 Woo f j/ .