Loading...
HomeMy WebLinkAbout5.b. Consumer Confidence Report - Drinking WaterCITY OF ROSEMOUNT EXECUTIVE SUMMARY FOR ACTION CITY COUNCIL MEETING DATE: July 5, 2000 AGENDA ITEM: Consumer Confidence Report AGENDA SECTION: Department Update PREPARED BY: Alyson Morris, Water Resource Engineer AGENQ fft, �. 5 ATTACHMENTS: 1999 Consumer Confidence Report APPROVED BY: As mandated by the 1996 amendments to the federal Safe Drinking Water Act, the 1999 Consumer Confidence Report was distributed to residents the week of June 26. The intent of the report is to advance consumers' understanding of drinking water, heighten awareness of the need to protect water resources, and enhance the image of the professionals in the drinking water community. The Consumer Confidence Report is sent out annually. Rosemount drinking water meets or exceeds all regulatory standards. Data is given to the City by the Minnesota Department of Health. RECOMMENDED ACTION: None. COUNCIL ACTION: Some contaminants do not have Maximum Contaminant Levels established for them and are assessed using state standards known as health risk limits to determine if they pose a throat to human health. if unacceptable levels of an unregulated contaminant arc found, the response is the same as if an MCL has been exceeded: the water system must inform its customers and take other corrective actions. In the table that follows are the unregulated contaminants that were detected. Contaminant Level Found Typical Range Avera a ( units) Source Sodium 3.2 6.1 6.1 Natural (PPrn) deposits P� Natural Nickel(ppb) nd 22.0 deposits, 22.0 industrial sites. COMPLIANCE WITH NATIONAL PRIMARY DRLN'KLNG WATER REGULATIONS The sources of drinking water (both tap 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 and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in source water include: Microbial contaminants (viruses and bacteria) may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife. Inorganic contaminants (salts and metals) can be naturally- occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming. Pesticides and herbicides may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses. Organic chemical contaminants (synthetic and volatile organic chemicals) are by- products of industrial processes and petroleum production, and can also come from gas stations, urban stonnwater runoff, and septic systems. Radioactive contaminants can be naturally- occurring or the result of oil and gas production and mining activities. In order to ensure that tap water is safe to drink, the U.S. Environmental Protection Agency (EPA) prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. 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 contaminants does not necessarily indicate that 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 800 - 426 -4791. Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno- compromised 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. EPAICDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium are available from the Sgje Drinking Water Hotline at 800 - 426 -4791. 1 x a U a z 0 a F a a C~ 0 a 00 �x T UiX 0 CITY OF ROSEMOUNT 1999 DRINKING WATER REPORT The City of Rosemount is issuing the results of monitoring done on its drinking water for the Period from January 1 to December 31, 1999. The purpose of this report is to advance consumers' understanding of drinking water and heighten awareness of the need to protect precious water resources. This is a requirement of the Federal Government's Safe Drinking Water Act and will be sent out annually. The City's water is frequently tested by City staff, the N innesota Department of Health and independent laboratories to ensure compliance with federal standards. Please call (651) 322 -2022 if you have any questions about the City of Rosemount drinking water or would like information about opportunities for public participation in decisions that may affect the quality of the water. RO . SEMOUNT DRINKING WATER MEETS OR EXCEEDS ALL REGULATORY STANDARDS in your Contaminant (units) MC[ MCL Leve Typical Source of Meets Inihat; and Young children a typically m ore vulnemb Range e* Regu le to lead in drinking wat than the general population. Standards 71te lead levels in the City of Rosemount water system were in cornplian andards how ever , it is Possible that Lead levels at your h ome may be high ce with drinking water st Nitrate (as nitrogen) hi than at other homes in the commula as & (ppm) 10.0 10.0 nd-3.3 -3 Fertilizer, sewage, natural result Of materials used in your home's plumbing. If you arc concerned about elevated lead levels deposits.: ✓ home's water, you may wish to have your water tested and flush your for 30 a to 2 minute f Drink Water using UP water. Additional information is available from the Saf e UP s s be ore Alpha Emitters (pCill) 0 15.0 5.9 Natural deposits ingWat Hodineat000426-4701. Contaminant MCLG AL (units) 90 Number of Level sites ove AL Typical Source of contaminant Combined Radium Copper (Ppm) Wito 0 5.0 IA Natural deposits. Beryllium (ppb) 4.0 4.0 nd-2.0 Metal refineries, coal- 2.0 burning factories, and 1( various us Other industries. other er indu ic.'. Xylenes (ppm) 10.0 10.0 ad- 0.0002 Petroleum and chemical 0.0002 factories. ✓ TTHM otal (9-29-1998 ) NA 15 tribalom (ppb) 0 100.0 - 3.1 By-product of drinking ✓ water chlorination. Fluoride (ppm) 4.0 4.0 0.87-1.5 1.09 Additive, natural deposits. Barium (ppm) 2.0 2.0 0.12 Drilling wast metal refineries, natural deposits. Arsenic (ppb) 0 50.0 nd-2.9 Natural deposits, Orchards; 2.9 glass and electronics S uc to ance comp lance wan tederal Standards. It some Is c I st v uc I deteaW va sometimes a an avenge 0 1OA -- mg-L '-I-- Contaminant Level Goal (t Contaminant in drinki = k u 9 Percend e- ISIS V n (N ote: � taken 10 % Of due samples taken that b th hi levels (Note: In In water below which Peered risk to health. MCLGs allow 9w a margin o f safety.) MCL Nts"Imum COntainhumt Level (the highest i siftletions; In which o 3 SAMPICS we taken. the average o f ft = �L 4 a ve r ag e which Only 3 1. 4 Ink kv two with the h levels is taken to determine t h e go- .90. kM of a Oonburaut that h allowed in drinki waxer. mcL we set a close 00 the MCLGs as fusible us th b "Ishic Percentile level.) Z- P- liner I PC14L- PicoCuries per liter (a meas o f nt ky � _ OL7 or ftmUW technology.) Ph Puts per billion (Man also be ex ja m i per an he a. r pressed crog AL. Acti L (* concentration of & contaminant which, If "We" bitten treatment Or Other requirement It liter. W) PPm- Parts Per million (can also be eximessed " milligrams per which a water Yttqm must rollow.1 liter, m#A) Contaminant MCLG AL (units) 90 Number of Level sites ove AL Typical Source of contaminant M eets Regulatory Copper (Ppm) Standards (9-29-1998) NA 13 0.3 0 of20 Co rrosion of umbing, natural deposits, woo ✓ Lead(ppb (9-29-1998 ) NA 15 3.4 2 of 20 Corrosion of plumbing, natural deposits ✓ The City of Rosemount Provides drinking wa t its residents from a I sou " from 400 to 499 feet deep, that draw from the jordan aquifer. Water i treated at rce: six wells ranging each well. The following i added to the well water chlorine for disinfection, fluoride for improved dental health, and poly-phosphat t Prevent naturally - occurring iron in the water from staining laundry. Rosemounts water c lassified ranging from 16 to IS grains per gallon. is as "barcr 7he Cit of Rosemount cIfft about the environtramL This brochure a printed with soy-based ink on 30% post-conswwr recycled Paper by a Vmn"Ote Great Print Who Is Committed to reducing the use of chemicals and r waste In the printing process. 4� Some contaminants do not have Maximum Contaminant Levels established for them and are assessed using state standards known as health risk limits to determine if they pose a threat to human health. If unacceptable levels of an unregulated contaminant are found, the response is the same as if an MCL has been exceeded: the water system must inform its customers and take other corrective actions. In the table that follows are the unregulated contaminants that were detected. Contaminant Level Found Typical Range Average (units) Source Sodium aka Natural 3.2 -6.1 6.1 (ppm) deposits Natural nd- deposits, Nickel (ppb) 22.0 22.0 industrial z sites. COMPLIANCE WITH NATIONAL PRIMARY DRINKING WATER REGULATIONS The sources of drinking water (both tap 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 and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity. Contaminants that may be present in source water include: Microbial contaminants (viruses and bacteria) may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife. Inorganic contaminants (salts and metals) can be naturally- occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming. Pesticides and herbicides may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses. Organic chemical contaminants (synthetic and volatile organic chemicals) are by- products of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems. Radioactive contaminants can be naturally - occurring or the result of oil and gas production and mining activities. In order to ensure that tap water is safe to drink, the U.S. Environmental Protection Agency (EPA) prescribes regulations which limit the amount of certain contaminants in water provided by public water systems. 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 contaminants does not necessarily indicate that 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 800 - 426 -4791. Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno- compromised 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. EPAICDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium are available from the Safe Drinking Water Hotline at 800- 426 -4791. 2 m to 0 0 o� aka U o a U a z E-� a E-� C/1 a 0 z z � U � • ��� Cn U � N � CITY OF ROSEMOUNT 1999 DRINKING WATER REPORT The City of Rosemount is issuing the results of monitoring done on its drinking water for the period from January 1 to December 31, 1999. The purpose of this report is to advance consumers' understanding of drinking water and heighten awareness of the need to protect precious water resources. This is a requirement of the Federal Government's Safe Drinking Water Act and will be sent out annually. The City's water is frequently tested by City staff, the Minnesota Department of Health and independent laboratories to ensure compliance with federal standards. Please call (651) 322 -2022 if you have any questions about the City of Rosemount drinking water or would like information about opportunities for public participation in decisions that may affect the quality of the water. ROSEMOUNT DRINKING WATER MEETS OR EXCEEDS ALL REGULATORY STANDARDS. *This value used to determine compliance with federal standards. It sometimes is the highest value detected and sometimes is an average of all the detected values. to 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.) 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.) AL- Action Level (the concentration of a contaminant which, if exceeded, triggers treatment or other requirement which a water system must follow.) 10% of the samples taken that had the highest levels. (Note: In situations in which only 5 samples are taken, the average of the two with the highest levels is taken to determine the 90' percentile level.) pCi/L- PicoCuries per liter (a measure of radioactivity). ppb- Parts per billion (can also be expressed as micrograms per liter, µg/1) ppm- Parts per million (can also be expressed as milligrams per liter, mg/1) nd No detection. Infants and young children are typically more vulnerable to lead in drinking water than the general population. The lead levels in the City of Rosemount water system were in compliance with drinking water standards; however, it is possible that lead levels at your home may be higher than at other homes in the community as a result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your home's water, you may wish to have your water tested and flush your tap for 30 seconds to 2 minutes before using tap water. Additional information is available from the Safe Drinking Water Hotline at 800 - 426 -4791. Contaminant (units) MCLG AL Level Found Typical Source of Meets Range Average * Contaminant (units) MCLG MCL Contamination Regulatory (9 -29 -1998) deposits, wood preservatives. Standards Nitrate (as nitrogen) 10.0 10.0 nd -3.3 3.3 rtilizer, sewage, natural ✓ (ppm) deposits. Alpha Emitters (pCi /1) 0 15.0 - 5.9 Natural deposits. If Combined Radium 0 5.0 - 1.4 Natural deposits. ✓ (pCi /1) Metal refineries, coal - Beryllium (ppb) 4.0 4.0 nd -2.0 2.0 burning factories, and ✓ various other industries. Xylenes (ppm) 10.0 10.0 nd 0.0002 petroleum and chemical ✓ 0.0002 factories. TTHM (Total 0 100.0 - 3.1 By- product of drinking ✓ trihalomethanes) (ppb) water chlorination. Fluoride (ppm) 4.0 4.0 0.87 -1.5 1.09 Additive, natural deposits. ✓ Barium (ppm) (PP ) 2.0 2.0 - 0.12 Drilling wastes, metal , refineries, natural deposits. Natural deposits, orchards; Arsenic (ppb) 0 50.0 nd -2.9 2.9 glass and electronics ✓ production. *This value used to determine compliance with federal standards. It sometimes is the highest value detected and sometimes is an average of all the detected values. to 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.) 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.) AL- Action Level (the concentration of a contaminant which, if exceeded, triggers treatment or other requirement which a water system must follow.) 10% of the samples taken that had the highest levels. (Note: In situations in which only 5 samples are taken, the average of the two with the highest levels is taken to determine the 90' percentile level.) pCi/L- PicoCuries per liter (a measure of radioactivity). ppb- Parts per billion (can also be expressed as micrograms per liter, µg/1) ppm- Parts per million (can also be expressed as milligrams per liter, mg/1) nd No detection. Infants and young children are typically more vulnerable to lead in drinking water than the general population. The lead levels in the City of Rosemount water system were in compliance with drinking water standards; however, it is possible that lead levels at your home may be higher than at other homes in the community as a result of materials used in your home's plumbing. If you are concerned about elevated lead levels in your home's water, you may wish to have your water tested and flush your tap for 30 seconds to 2 minutes before using tap water. Additional information is available from the Safe Drinking Water Hotline at 800 - 426 -4791. Contaminant (units) MCLG AL 90% Level Number of sites over AL Typical Source of Contaminant Meets Regulatory Standards Copper (ppm) NA 1.3 0.3 0 of 20 Corrosion of plumbing, natural ✓ (9 -29 -1998) deposits, wood preservatives. Lead (ppb) NA 15 3.4 2 of 20 Corrosion of plumbing, natural ✓ (9 -29 -1998) deposits The City of Rosemount provides drinking water to its residents from a groundwater source: six wells ranging from 400 to 498 feet deep, that draw from the Jordan aquifer. Water is treated at each well. The following is added to the well water: chlorine for disinfection, fluoride for improved dental health, and poly - phosphates to prevent naturally- occurring iron in the water from staining laundry. Rosemount's water is classified as "hard ", ranging from 16 to 18 grains per gallon. The City of Rosemount cares about the environment. This brochure is printed with soy -based ink on 30% post- consumer recycled paper by a Minnesota Great Printer, who is committed to reducing the use of chemicals and waste in the printing process.