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Santa Barbara WaterQualityNewsletter2010 | Water Purification | Drinking Water

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Santa Barbara water quality newsletter 2010
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  Santa Barbara Water City of Santa Barbara Annual Water Quality Report  June 2010 Water Treatment Plant Improvements   The Cater Water Treatment Plant  was constructed in 1964 to treat  water from Lake Cachuma for the residents of Santa Barbara. Over the years it has been expanded to also treat water from Gibraltar Reservoir, and to treat Cachuma  water for Montecito, Summerland and Carpinteria. Currently chlorine is added at the beginning of the treatment process to condition the water so that organic matter is filtered out. Chlorine is also added at the end of the treatment process to provide a lasting disinfectant to keep bacteria from growing in the water. Cater Water Treatment Plant, located in the San Roque foothills New Water Regulations Recent changes in regulations set by the U.S. Environmental Protection  Agency (EPA) require that the City change the way it treats our drinking  water. The EPA has developed a stricter standard for disinfection by-products – chemical compounds that are formed when chlorine reacts  with organic materials in the water. High Quality Drinking Water – A Tradition  To comply with the new EPA regulations, the City will switch to using ozone at the beginning of the  water treatment process. Ozone is more effective at conditioning  water to remove organic matter. Ozone for Better Water Treatment Lake Cachuma, Cater’s main water source Since the treated water contains less organic matter, fewer disinfection  by-products are formed. Ozone has been used in water treatment for over 100 years. Today there are over 400 water treatment plants in the United States using ozone. The construction costs for the ozone generation facility, ozone contactor (where ozone is mixed  with water), and other related plant improvements are anticipated to be $20 million. A low interest loan will provide the funds for this project. The loan will be repaid from water rate revenue. The project is scheduled to  begin in 2011.  ã Microbial contaminants such as  bacteria and viruses that may come from wildlife or human activity.ã Inorganic contaminants such as salts and metals that can be naturally-occurring or result from human activities.ã Radioactive contaminants, which can be naturally-occurring. ã Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban storm-  water run-off, and residential uses.ã Organic chemical contaminants, including synthetic and volatile organic chemicals that are  by-products of industrial processes, petroleum production and use, or agricultural applications and septic systems.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 EPA Safe Drinking Water Act Hotline at 1-800-426-4791 or visiting their  website at www.epa.gov/safewater/. Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as those who: are undergoing chemotherapy, have undergone organ transplants, have HIV/  AIDS or other immune system disorders, or are very old or young can be particularly at risk from infections. These people should seek advice from their health care  providers about drinking water. USEPA/Centers for Disease Control (CDC) guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the EPA Safe Drinking Water Act Hotline at 1-800-426-4791 or www.epa.gov/safewater/. Special Info Available Drinking Water Treatment Regulations The City gets most of its drinking water from Lake Cachuma and Gibraltar Reservoir. A portion of the City’s water also comes from wells. As water travels over 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. Contami-nants that may be present in the water source include: In 2009, as in previous years, City of Santa Barbara water met all primary state and federal standards for drinking water. All of the drinking water that comes from Lake Cachuma and Gibraltar Reservoir is treated at the Cater Water Treatment Plant before being distributed to customers. Those who have questions about water quality may call the water department in their community and ask for a copy of their Consumer Confidence Report, such as this. To ensure safe drinking water, federal and state regulations limit the amount of certain contaminants in public water systems. Regulations also establish limits for contaminants in bottled water to provide protection for public health. Safe Drinking Water Hotline and Web Site  Radon is a radioactive gas that you can’t see,taste,or smell that is found throughout the United States. It occurs naturally in certain rock formations. As a result,radon can be found in Santa Barbara’s groundwater.Groundwater is a small part (7.6%) of the City’s total water supply. Radon has not been detected in the City’s surface water. Radon can enter homes through cracks or holes in foundations and floors. Radon can also get indoors when released from tap water. Test your home if you are concerned about radon. Testing is inexpensive and easy. For additional information,call your State radon program 1-800-745-7236,the EPA Safe Drinking Water Act Hotline 1-800-426-4791,or the National Safe Council Radon Hotline 1-800-SOS-RADON. Radon Limited Potential for Contamination The City has evaluated the vulnerability of our water supplies to contamination. For potential contaminates at Lake Cachuma, the use of two stroke engines contributes MTBE to the water. Gibraltar Reservoir’s remote location, and the restriction of access to the reservoir limit opportunities for contamination. City groundwater supplies are generally located deep beneath the surface. Nonetheless, there is the potential for contaminants from surface sources such as gasoline stations and dry cleaners to reach City water supplies. All water sources are carefully  monitored to ensure that pollutants are not present at levels exceeding state and federal standards. For more information, call 568-1008. The City’s surface water at Cater Water Treatment Plant has a hardness range of  20 to 25 grains per gallon. The City’s groundwater supplies have a hardness range of 12 to 40. One grain per gallon equals 17.1 milligrams per liter. Your Water Softener Setting WHERE YOUR DRINKING WATER COMES FROM Bradbury DamState Water Project  Lake Cachuma GoletaMontecitoSanta Barbara Santa Ynez River  Tecolote Tunnel    6.5 miles long  Mission Tunnel  3.7 miles long South Coast Conduit 24 miles long Cater Water Treatment Plant Charles Meyer Desalination Facility Groundwater Wells GibraltarReservoir Water from Lake Cachuma to Cater Water Treatment Plant  Building the Tecolote Tunnel  The photo below shows a crew at work on the Tecolote Tunnel.It took six years to build and wascompleted in January 1956.Water from Gibraltar Reservoir to Cater Water Treatment Plant    WHERE YOUR DRINKING WATER COMES FROM El Estero Wastewater Treatment Plant  Sheffield ReservoirLauro Reservoir Many people wonder how the statewide drought, which has reduced State Water availability, has affected Santa Barbara. Fortunately, the City currently has very limited demand for State Water. Our primary water supply is Lake Cachuma,  which is a multi-year storage facility that reduces the impact of periodic dry  years. The Gibraltar Reservoir is anoth-er important water source. Gibraltar and State of the Water Supply Gibraltar Reservoir is one of the City of Santa Barbara’s main sources of water. Cachuma filled completely in 2008 and the moderate El Niño conditions of 2010  were enough to fill Gibraltar and almost fill Cachuma again. Our water supply is in good shape, but we are always just a few years away from another potential drought. This is why water conservation is so important. Water saved this year is available for use in future years if local conditions turn dry again.Conservation is one of many issues  being studied to update the City’s Long Term Water Supply Program. The update will assess the City’s many supply sources, anticipated demand, and opportunities to boost  water conservation and use of recy-cled water. For more information, visit: SantaBarbaraCA.gov/water or call 564-5460. For Water Wise Gardening in Santa Barbara County website and CD visit: SantaBarbaraCA.gov/water   0.0655.18.60.63 NAAL,1.3AL,15 8060MRDLG,4.0TT15NA110502.04550Notification Level,1000NA   Definitions Public Health Goal (PHG)  The level of a contaminant in drinking water below which there is no known or expected risk to health. PHGs are set by the California Environmental Protection Agency. Maximum Contaminant Level Goal (MCLG)  The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs are set by the U.S. Environmental Protection Agency. Maximum Contaminant Level (MCL)  The highest level of a contaminant that is allowed in drinking water. Primary MCLs are set as close to the PHGs (or MCLGs) as is economically and tech-nologically feasible. Secondary MCLs are set to protect the odor, taste, and appearance of drinking water. Maximum Residual Disinfectant Level Goal (MRDLG)   The level of a drinking water disinfec-tant 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.  Maximum Residual Disinfectant Level (MRDL)  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. Regulatory Action Level (AL)  The concentration of a contaminant which, if exceeded, triggers a treatment or other requirements which a water system must follow. Treatment Technique (TT) A required process intended to reduce the level of contaminants in drinking water. Primary Drinking Water Standards (PDWS) MCLs and MRDLs for contaminants that affect health along with their monitor-ing and reporting requirements and water treatment requirements. Secondary Drinking Water Standards (SDWS) MCLs for contaminants that effect taste, odor, or appearance of drinking water. Contaminants with SDWS do not affect the health at MCL levels. Unregulated Contaminant Monitoring Regulations (UCMR) Data generated by the new UCMR will be used to evaluate and prioritize contaminants on the Drinking Water Contaminant Candidate List, a list of contaminants EPA is considering for possible new drinking water standards. Also known as “State Regulated Con-taminants with No MCLs”. Legend µg/L: Micrograms per liter (parts per billion) mg/L :  Milligrams per liter (parts per million) ND:  Not detected at testing limit NTU: Nephelometric  Turbidity Units pCi/L :  PicoCuries per liter (a measure of radiation) µmhos/cm:  Micromhos per centimeter DBP:  Disinfection By-products NA: Not applicable or no standard or no data 2009 City Drinking Water Quality Report PRIMARY STANDARDS  TT = 1 NTU TT = 95% of samples<0.3 NTU 0.30.2NANAMRDLG,4NAMCLG,0 NA0.60.004 MCLG,100145MCLG,50NANA100%00 2.6 - 126ND - 19.0ND - 2.60 SECONDARY STANDARDS  151300 50535NA510001600500 500NANANANANANANANA NANANANANANANA NANA NANANA NANANANANANANA   ND0.01ND 0.2ND60.12NA0.01651 92522.2 268 8.05398190 91.340454.4   NAND - 0.05NAND - 2.5NA2 - 150.07 - 0.20NA0.006 - 0.02568-714 852 - 104417.2 - 27.4216 - 300 7.80 - 8.22344 - 430178 - 20479.3 - 99.333 - 4839 - 524.0 - 4.7 0.250.024262.61.590.46.50.02 81011561002366.99465248 12339671.8   ND - 70.001 - 0.09ND -280ND - 200ND - 6.61-200.09 - 1.235.8 - 7.2ND - 0.17 596 - 1160866 - 1758 42.8 - 213 156 - 3696.61 - 7.22214 - 676200 - 31384 - 16222 - 6642 - 1001.3 - 2.7 Naturally-occurring organic materialsInternal corrosion of household plumbing systems;erosion of natural deposits; leaching from wood preservativesLeaching from natural depositsNaturally-occuring organic materials;causes discoloration of water Leaking underground gasoline storage tanks;discharge from gasoline and chemical factories Naturally-occurring organic materialsSoil run-off Erosion of natural depositsNaturally-occurringintraceamounts,butcanbedetectedinsoft,acidicwatersystemsRun-off / leaching from natural depositsRun-off / leaching from natural deposits;seawater influence Run-off / leaching from natural deposits;seawater influenceRun-off / leaching from natural deposits  Aesthetic Standards Established By the State of California, Department of Health Services.   Regulated Contaminants with Primary MCLs or MRDLs No adverse health affects from exceedence of standards. Monitored at the Customer’s Tap Natural river sediment/soil run-off  Internal corrosion of household plumbing systems;erosion of natural deposits;leaching from wood preservativesBy-product of water disinfectionBy-product of water disinfectionDrinking water disinfectant added to treatment Various natural and manmade sources.Total Organic Carbon (TOC) has no health effects. However,it provides a medium for the formation of disinfection by-products. Erosion of natural depositsSeereportingnoticeonRadoninthisreport.Erosion of natural depositsErosion of natural depositsErosion of natural deposits Erosion of natural deposits;discharge from fertilizer & aluminum factoriesErosion of natural deposits;run-off from fertilizer useErosion of natural deposits Erosion of natural deposits Microbiological Contaminants  Turbidity (NTU)  Lead/Copper Rule  Copper (mg/L) Lead (µg/L) Disinfection By-products, Disinfectant Residuals, and Disinfection By-product Precursors  Total Trihalomethanes (µg/L) Haloacetic Acids (µg/L) Disinfectant - Chlorine as Cl 2  (mg/L) Control of DBP Precursors - TOC (mg/L) Radioactive Contaminants  Gross Alpha Particle Activity (pCi/L) Radon (pCi/L) Inorganic Contaminants  Aluminum (mg/L) Arsenic (µg/L) Chromium (µg/L) Fluoride (mg/L) Nitrate as NO 3  (mg/L) Selenium (µg/L) Boron (µg/L) Hexavalent chromium, - Cr VI (µg/L)   Color (Units) Copper (mg/L) Iron (µg/L) Manganese (µg/L) Methyl-tert-butyl ether (MTBE) (µg/L) Threshold Odor Number at 60 °C (units) Turbidity, Laboratory (NTU) Uranium (µg/L) Zinc (mg/L) Total Dissolved Solids (mg/L) Specific Conductance (µmhos/cm) Chloride (mg/L) Sulfate (mg/L)  Additional Constituents  pH (units) Total Hardness as CaCO 3  (mg/L) Total Alkalinity as CaCO 3  (mg/L) Calcium as Ca (mg/L) Magnesium (mg/L) Sodium (mg/L) Potassium (mg/L)  Note:  Listed in the table above are substances detected in the City’s drinking water. Not listed are more than 135 regulated and unregulated substances that were below the laboratory detection level. Public Health GoalMaximum Contaminant Level (MCL)Major Sources in Drinking WaterHighest Single MeasurementSamples ≤ 0.3 NTU90th % Value# of Sites Sampled# of Sites Exceeding Action Level 0.262.93131 System Wide AverageSystem Wide RangeSurface Water AverageSurface Water Range 2.76NDNA0.081.31.80.430.37ND380ND2.24 - 3.19NANA0.01 - 0.301.1 - 3.5ND - 5.60.24 - 0.52ND - 1.24No RangeNo RangeNA Groundwater AverageGroundwater Range 0.21 - 0.55ND - 3.7 310 - 320ND - 0.25ND - 1.9ND - 11.9ND - 0.600.58 - 41.6No Range70 -160ND - 1.90 State Regulated Contaminants with No MCLs, i.e. Unregulated Contaminants Surface Water AverageSurface Water RangeGroundwater AverageGroundwater RangePublic Health GoalMCL Public Health GoalMCL Regulated Contaminants with Secondary MCLs Surface Water AverageSurface Water RangeGroundwater AverageGroundwater RangePublic Health GoalMCL 0.36ND3150.030.54.30.369.957.6110 0.58
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