Cary/Apex Water Treatment Facility Finished Water Quality Report For 2014

Transcription

1 Cary/Apex Treatment Facility Finished Quality Report For 2014 We are pleased to present to you this year's Annual Finished Quality Report. This report is a snapshot of last year s water quality. The values contained in this report are based on single measurements or yearly averages depending on the contaminant. The EPA and/or the State requires us to monitor for certain substances less than once per year because the concentrations of these substances are not expected to vary significantly from year to year. Some of the data, though representative of the water quality, is more than one year old. In these cases, the most recent data are included, along with the year in which the sample was taken. It is our constant goal to provide you with a safe and dependable supply of drinking water. If you have any questions regarding this report, please contact Kelvin Creech, Manager of the Cary/Apex Treatment Facility or Rachel Monschein, Chemist/Lab Supervisor at (919) In order to ensure that tap water is safe to drink, EPA prescribes regulations which limit the amount of certain contaminants in water provided by public water 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. To obtain more information about contaminants and potential health effects, call the Environmental Protection Agency's Safe Drinking Hotline ( ). Lead and Copper Copper (ppm) (90 th percentile) Lead (90 th percentile) # of sites found above the AL AL= AL=15 G Likely Source of Contamination Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives Corrosion of household plumbing systems, erosion of natural deposits Nitrate and Nitrite Nitrate (as Nitrogen) (ppm) N <1 N/A Nitrite (as Nitrogen) (ppm) N <0.1 N/A 1 1 Asbestos G Likely Source of Contamination Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits G Likely Source of Contamination Decay of asbestos cement water mains; Total Asbestos (MF/L) 2011 N < 0.17 N/A 7 7 erosion of natural deposits Note: One asbestos sample is required to be taken during the first 3-yr compliance period of each 9-yr compliance cycle beginning in the compliance period starting 1/1/2011 and ending 12/31/2019. The Cary/Apex WTP collected a sample for asbestos analysis in Disinfectants and Disinfection Byproducts /MRDL TTHM [Total Trihalomethanes] HAA5 [Total Haloacetic Acids] N N 34.7 (Maximum LRAA) 10.8 (Maximum LRAA) (individual sample sites) 0-19 (individual sample sites) G Likely Source of Contamination N/A 80 By-product of drinking water chlorination N/A 60 By-product of drinking water disinfection Bromate N 2.13 < By-product of drinking water disinfection Chloramines (ppm) N Chlorine, Free (ppm) N MRDLG = 4 MRDLG = 4 MRDL = 4 MRDL = 4 additive used to control microbes additive used to control microbes Total Organic Carbon N N/A TT Naturally present in the environment (removal ratio) Note: Compliance with the s for TTHMs, HAA5s, Bromate, Chloramines, and Free Chlorine are based on the running annual average (RAA) shown in the column.

2 2014 Finished Quality Report - page 2 Turbidity (Combined Filter Effluent Turbidity Values) G Turbidity (NTU) N 0.16 N/A TT = 1 NTU Soil runoff Likely Source of Contamination Note: Compliance with the for turbidity is based on the combined filter effluent turbidity values, not the finished water turbidity values. Radiologicals G Likely Source of Contamination Alpha emitters (pci/l) 2008 N < Erosion of natural deposits Beta / photon emitters (pci/l) 2008 N < Decay of natural and man-made deposits Radium 226 (pci/l) 2008 N < Erosion of natural deposits Radium 228 (pci/l) 2008 N < Erosion of natural deposits Uranium (pci/l) 2008 N < Erosion of natural deposits Note: The most recent sample analyzed for Radiologicals was in Microbiologicals G Likely Source of Contamination Total Coliform Bacteria (presence or absence) N 0% were positive 0 5 % of monthly samples are positive Naturally present in the environment Fecal Coliform or E. coli (presence or absence) N (Note: The is exceeded if a routine sample and repeat sample are total coliform positive, and one is also fecal coliform or E. coli positive) Human and animal fecal waste Cryptosporidium (oocysts/l) N ND 0 TT = 99 % removal Human and animal fecal waste Giardia lamblia (cysts/l) N ND 0 TT = 99 % removal/inactivation Human and animal fecal waste Note: The most recent sample analyzed for Cryptosporidium and Giardia lamblia was in Trihalomethanes (THMs) Likely Source of Contamination Chloroform 2014 N By-product of drinking water chlorination Bromodichloromethane 2014 N By-product of drinking water chlorination Bromoform 2014 N By-product of drinking water chlorination Chlorodibromomethane 2014 N By-product of drinking water chlorination Note: Not individually regulated. Haloacetic Acids (HAAs) Likely Source of Contamination Trichloroacetic Acid 2014 N By-product of drinking water chlorination Dichloroacetic Acid 2014 N By-product of drinking water chlorination Monochloroacetic Acid 2014 N 0.0 No range By-product of drinking water chlorination Monobromoacetic Acid 2014 N 0.0 No range By-product of drinking water chlorination Dibromoacetic Acid 2014 N By-product of drinking water chlorination Note: Not individually regulated.

3 2014 Finished Quality Report - page 3 Regulated Inorganics Antimony 2014 N < 3 N/A 6 6 Arsenic 2014 N < 5 N/A 0 10 Barium (ppm) 2014 N < 0.4 N/A 2 2 Beryllium 2014 N < 2 N/A 4 4 Cadmium 2014 N < 1 N/A 5 5 Chromium 2014 N < 20 N/A Cyanide, Total 2014 N < 50 N/A Fluoride (ppm) 2014 N < Mercury (inorganic) 2014 N < 0.4 N/A 2 2 Selenium 2014 N < 10 N/A Thallium 2014 N < 1 N/A Quality Characteristics G Likely Source of Contamination Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder Erosion of natural deposits; runoff from orchards; runoff from glass and electronics production wastes Discharge of drilling wastes; discharge from metal refineries; erosion of natural deposits Discharge from metal refineries and coalburning ; discharge from electrical, aerospace, and defense industries Corrosion of galvanized pipes; erosion of natural deposits; discharge from metal refineries; runoff from waste batteries and paints Discharge from steel and pulp mills; erosion of natural deposits Discharge from steel/metal ; discharge from plastic and fertilizer Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum Erosion of natural deposits; discharge from refineries and ; runoff from landfills; runoff from cropland Discharge from petroleum and metal refineries; erosion of natural deposits; discharge from mines Leaching from ore-processing sites; discharge from electronics, glass, and drug Secondary Alkalinity, Total, as CaCO 3 (ppm) N/A Aluminum (ppm) < Ammonia, Free (ppm) < N/A Ammonia, Total (ppm) N/A Calcium (ppm) N/A Carbon Dioxide (ppm) N/A Chloride (ppm) Color (CU) Conductivity (us/cm) N/A Hardness, Total, as CaCO 3 (ppm) Classified as moderately soft Hardness, Total, as CaCO 3 (grains per gallon) Classified as moderately soft Iron (ppm) 2014 <0.05 < Magnesium (ppm) N/A Manganese (ppm) 2014 <0.01 <

4 2014 Finished Quality Report - page 4 Quality Characteristics (continued) Note: The most recent sample analyzed for silica was in The most recent sample analyzed for zinc was in These parameters are not part of our required compliance monitoring. Synthetic Organic Chemicals (SOCs) Including Pesticides and Herbicides G Likely Source of Contamination 2,4-D 2014 N < 0.1 N/A Runoff from herbicide used on row crops 2,4,5-TP (Silvex) 2014 N < 0.2 N/A Residue of banned herbicide Alachlor 2014 N < 0.2 N/A 0 2 Runoff from herbicide used on row crops Atrazine 2014 N < 0.1 N/A 3 3 Runoff from herbicide used on row crops Benzo(a)pyrene (PAH) (ppt) 2014 N < 20 N/A Carbofuran 2014 N < 0.9 N/A Leaching from linings of water storage tanks and distribution lines Leaching of soil fumigant used on rice and alfalfa Chlordane 2014 N < 0.2 N/A 0 2 Residue of banned termiticide Dalapon 2014 N <1 N/A Secondary Nickel (ppm) 2014 <0.1 N/A N/A Odor (TON) Ortho-Phosphate (ppm) N/A ph (SU) to 8.5 Silica (ppm) < N/A Sodium (ppm) N/A Sulfate (ppm) N/A 250 Total Dissolved Solids (ppm) Total Phosphorous (ppm) N/A Zinc (ppm) 2006 <0.005 N/A 5 Runoff from herbicide used on rights of way Bis(2-ethylhexyl)adipate 2014 N < 0.6 N/A Discharge from chemical Bis(2-ethylhexyl)phthalate 2014 N < 1.32 N/A 0 6 Discharge from rubber and chemical 1,2-Dibromo-3-chloropropane (DBCP) (ppt) 2014 N < 20 N/A Dinoseb 2014 N < 0.2 N/A 7 7 Runoff/leaching from soil fumigant used on soybeans, cotton, pineapples, and orchards Runoff from herbicide used on soybeans and vegetables Endrin 2014 N < 0.01 N/A 2 2 Residue of banned insecticide Ethylene dibromide (EDB) (ppt); also known as 1,2-Dibromoethane 2014 N < 10 N/A 0 50 Discharge from petroleum refineries Heptachlor (ppt) 2014 N < 40 N/A Residue of banned pesticide Heptachlor epoxide (ppt) 2014 N < 20 N/A Breakdown of heptachlor Hexachlorobenzene 2014 N < 0.1 N/A 0 1 Discharge from metal refineries and agricultural chemical

5 2014 Finished Quality Report - page 5 Synthetic Organic Chemicals (SOCs) Including Pesticides and Herbicides (continued) G Likely Source of Contamination Hexachlorocyclopentadiene 2014 N < 0.1 N/A Discharge from chemical Lindane (ppt); also known as gamma-bhc 2014 N < 20 N/A Methoxychlor 2014 N < 0.1 N/A Oxamyl(vydate) 2014 N < 2 N/A Polychlorinated biphenyls (PCBs) (ppt) 2014 N < 100 N/A Pentachlorophenol 2014 N < 0.04 N/A 0 1 Runoff/leaching from insecticide used on cattle, lumber, gardens Runoff/leaching from insecticide used on fruits, vegetables, alfalfa, livestock Runoff/leaching from insecticide used on apples, potatoes and tomatoes Runoff from landfills; discharge of waste chemicals Discharge from wood preserving Picloram 2014 N < 0.1 N/A Herbicide runoff Simazine 2014 N < 0.07 N/A 4 4 Herbicide runoff Toxaphene 2014 N < 1 N/A 0 3 Runoff/leaching from insecticide used on cotton and cattle Unregulated SOCs Including Pesticides and Herbicides Aldicarb 2014 < 0.5 N/A Aldicarb Sulfone 2014 < 0.8 N/A Aldicarb Sulfoxide 2014 < 0.5 N/A Aldrin 2014 < 0.2 N/A Butachlor 2013 < 8 N/A Carbaryl 2014 < 4 N/A Dicamba 2014 < 1 N/A Dieldrin 2014 < 0.2 N/A 3-Hydroxycarbofuran 2014 < 4 N/A Methomyl 2014 < 4 N/A Metolachlor 2013 < 0.8 N/A Metribuzin 2013 < 0.8 N/A Propachlor 2013 < 6 N/A Volatile Organic Chemicals (VOCs) Low / High Benzene 2014 N < 0.5 N/A 0 5 Carbon tetrachloride 2014 N < 0.5 N/A 0 5 Chlorobenzene 2014 N < 0.5 N/A G Likely Source of Contamination Discharge from ; leaching from gas storage tanks and landfills Discharge from chemical plants and other industrial activities Discharge from chemical and agricultural chemical

6 2014 Finished Quality Report page 6 Volatile Organic Chemicals (VOCs) Low / High 1,2-Dichlorobenzene 2014 N < 0.5 N/A ,4-Dichlorobenzene 2014 N < 0.5 N/A ,2 Dichloroethane 2014 N < 0.5 N/A 0 5 1,1 Dichloroethene 2014 N < 0.5 N/A 7 7 cis-1,2-dichloroethene 2014 N < 0.5 N/A trans-1,2-dichloroethene 2014 N < 0.5 N/A ,2-Dichloropropane 2014 N < 0.5 N/A 0 5 G Likely Source of Contamination Ethylbenzene 2014 N < 0.5 N/A Discharge from petroleum refineries Methylene chloride ; also know as Dichloromethane 2014 N < 0.5 N/A 0 5 Discharge from pharmaceutical and chemical Styrene 2014 N < 0.5 N/A Tetrachloroethene 2014 N < 0.5 N/A 0 5 1,2,4 Trichlorobenzene 2014 N < 0.5 N/A Discharge from rubber and plastic ; leaching from landfills Discharge from and dry cleaners Discharge from textile-finishing 1,1,1 Trichloroethane 2014 N < 0.5 N/A ,1,2 Trichloroethane 2014 N < 0.5 N/A 3 5 Trichloroethene 2014 N < 0.5 N/A 0 5 Discharge from metal degreasing sites and other Discharge from metal degreasing sites and other Toluene (ppm) 2014 N < N/A 1 1 Discharge from petroleum Vinyl chloride 2014 N < 0.5 N/A 0 2 Xylenes, Total (ppm) 2014 N < N/A Leaching from PVC piping; discharge from plastics Discharge from petroleum ; discharge from chemical Unregulated VOCs Bromobenzene 2014 < 0.5 N/A Bromochloromethane 2014 < 0.5 N/A Bromomethane 2014 < 0.5 N/A n-butylbenzene 2014 < 0.5 N/A Sec-Butylbenzene 2014 < 0.5 N/A Tert-Butylbenzene 2014 < 0.5 N/A Chloroethane 2014 < 0.5 N/A Chloromethane 2014 < 0.5 N/A 2-Chlorotoluene 2014 < 0.5 N/A 4-Chlorotoluene 2014 < 0.5 N/A

7 2014 Finished Quality Report - page 7 Unregulated VOCs (continued) Dibromomethane 2014 < 0.5 N/A 1,3-Dichlorobenzene ; also know as meta-dichlorobenzene 2014 < 0.5 N/A Dichlorodifluoromethane 2014 < 0.5 N/A 1,1-Dichloroethane 2014 < 0.5 N/A 1,3-Dichloropropane 2014 < 0.5 N/A 2,2-Dichloropropane 2014 < 0.5 N/A 1,1-Dichloropropene 2014 < 0.5 N/A 1,3-Dichloropropene 2014 < 0.5 N/A Hexachlorobutadiene 2014 < 0.5 N/A Isopropylbenzene 2014 < 0.5 N/A 4-Isopropyltoluene 2014 < 0.5 N/A MTBE 2014 < 0.5 N/A Naphthalene 2014 < 0.5 N/A n-propylbenzene 2014 < 0.5 N/A 1,1,1,2-Tetrachloroethane 2014 < 0.5 N/A 1,1,2,2-Tetrachloroethane 2014 < 0.5 N/A 1,2,3-Trichlorobenzene 2014 < 0.5 N/A 1,2,3-Trichloropropane 2014 < 0.5 N/A Trichlorofluoromethane ; also know as Fluorotrichloromethane 2014 < 0.5 N/A 1,2,4-Trimethylbenzene 2014 < 0.5 N/A 1,3,5-Trimethylbenzene 2014 < 0.5 N/A Unregulated UCMR1 Contaminants (Note: all results are below the method reporting limit for this analysis) Perchlorate 2002 < 4 N/A 4 DCPA Acid Metabolites 2002 < 1 N/A 1 MTBE 2002 < 5 N/A 5 Nitrobenzene 2002 < 10 N/A 10 Acetochlor 2002 < 2 N/A 2 2,4 Dinitrotoluene 2002 < 2 N/A 2 2,6 Dinitrotoluene 2002 < 2 N/A 2 4,4 DDE 2002 < 0.8 N/A 0.8 EPTC 2002 < 1 N/A 1 Molinate 2002 < 0.9 N/A 0.9 Terbacil 2002 < 2 N/A 2 Note: The monitoring requirement for these unregulated UCMR1 contaminants has been met. No further testing for these contaminants is required at this time. MRL

8 2014 Finished Quality Report - page 8 Unregulated UCMR2 Contaminants (Note: all results are below the method reporting limit for this analysis) Dimethoate 2010 < 0.7 N/A 0.7 Terbufos sulfone 2010 < 0.4 N/A 0.4 MRL 2,2,4,4 -tetrabromodiphenyl ether (BDE-47) 2,2,4,4,5-pentabromodiphenyl ether (BDE-99) 2,2,4,4,5,5 -hexabromobiphenyl (245-HBB) 2,2,4,4,5,5 -hexabromodiphenyl ether (BDE-153) 2,2,4,4,6-pentabromodiphenyl ether (BDE-100) 2010 < 0.3 N/A < 0.9 N/A < 0.7 N/A < 0.8 N/A < 0.5 N/A 0.5 1,3-dinitrobenzene 2010 < 0.8 N/A 0.8 2,4,6-trinitrotoluene (TNT) 2010 < 0.8 N/A 0.8 Hexahydro-1,3,5-trinitro-1,3,5- triazine (RDX) 2010 < 1.0 N/A 1.0 Acetochlor 2010 < 2.0 N/A 2.0 Alachlor 2010 < 2.0 N/A 2.0 Metolachlor 2010 < 1.0 N/A 1.0 Acetochlor ethane sulfonic acid (ESA) Acetochlor oxanilic acid (OA) 2010 < 1.0 N/A < 2.0 N/A 2.0 Alachlor ESA 2010 < 1.0 N/A 1.0 Alachlor OA 2010 < 2.0 N/A 2.0 Metolachlor ESA 2010 < 1.0 N/A 1.0 Metolachlor OA 2010 < 2.0 N/A 2.0 N-nitrosodiethylamine (NDEA) N-nitrosodimethylamine (NDMA) (ppt) N-nitrosodi-n-butylamine (NDBA) N-nitrosodi-n-propylamine (NDPA) N-nitrosomethylethylamine (NMEA) 2010 < N/A < N/A < N/A < N/A N-nitrosopyrrolidine (NPYR) 2010 < N/A Note: The monitoring requirement for these unregulated UCMR2 contaminants has been met. No further testing for these contaminants is required at this time.

9 2014 Finished Quality Report - page 9 Treatment Process Information The treatment process information contained in the following table does not represent what is in the Finished. The dosages listed for each chemical represents a range of concentrations for that chemical that may be used at the Plant during the water treatment process. Chemical (units) Typical Dosage Ozone (ppm) Oxidant Aluminum Sulfate (ppm) Coagulant Polymer (ppm) Coagulant aid Sodium Hydroxide (ppm) ph control Purpose of Treatment Carbon (ppm) Taste and odor control and organics removal Polymer (ppm) Filtration aid Orthophosphate Corrosion control Hydrofluorosilicic Acid (ppm) Fluoride additive Chlorine (ppm) Disinfectant Ammonia (ppm) *No ammonia was fed during March of this year Disinfectant when used in conjunction with chlorine to form chloramines Important Drinking Definitions: Not-Applicable (N/A) Information not applicable or not required. Non-Detects (ND) - the contaminant is not present at the level of detection set for the particular method used. Method Reporting Limit (MRL) - the lowest reportable concentration set for the particular method used. Action Level (AL) - The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow. Treatment Technique (TT) - A treatment technique is a required process intended to reduce the level of a contaminant in drinking water. Maximum Contaminant Level Goal (G) - The level of a contaminant in drinking water below which there is no known or expected risk to health. Gs allow for a margin of safety. Maximum Contaminant Level () - The highest level of a contaminant that is allowed in drinking water. s are set as close to the Gs as feasible using the best available treatment technology. Extra Note: s are set at very stringent levels. To understand the possible health effects described for many regulated constituents, a person would have to drink 2 liters of water every day at the level for a lifetime to have a one-in-a-million chance of having the described health effect. Maximum Residual Disinfection Level Goal (MRDLG) The level of a drinking water disinfectant 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 Disinfection 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. Million Fibers per Liter (MF/L) - is a measure of the presence of asbestos fibers that are longer than 10 micrometers. Nephelometric Turbidity Unit (NTU) - is a measure of the clarity or turbidity of water. Microsiemens per centimeter (us/cm) is a measure of the conductivity of water. Parts per million (ppm) or Milligrams per liter (mg/l) - one part substance per million parts water. Parts per billion or Micrograms per liter (ug/l) - one part substance per billion parts water. Parts per trillion (ppt) or Nanograms per liter (nanograms/l) - one part substance per trillion parts water. Picocuries per liter (pci/l) is a measure of the radioactivity in water. Running Annual Average (RAA) compliance calculations based on a running annual average of reported values. Standard Units (SU) is a measure of the ph of water. Threshold Odor Number (TON) is a measure of the odor of water. is the annual average value, not the maximum value, for the parameter listed. EPA requires that maximum amounts detected be reported in the Annual Quality Report (CCR).