| The source of the Oakwood Terrace water supply is Lake Massabesic located in East Manchester and Auburn, NH. The Manchester Water Treatment Plant is located at 281 Lincoln Street, Manchester, NH. | ||||||||||
| OAKWOOD TERRACE | ||||||||||
| EPA # 0612010 | ||||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Average Level Detected | Range | Violation Yes/No | Typical Source of Contaminant | |||
| Lead | ppb | 0 | 15 (AL) | 10 | 0.0 - 14 | NO | Corrosion of household plumbing system; erosion of natural deposits | |||
| 90th Percentile | ||||||||||
| Copper | ppm | 1.3 | 1.3 (AL) | 0.019 | 0.0 - 0.019 | NO | Corrosion of household plumbing system; erosion of natural deposits; Leaching from wood preservatives | |||
| 90th Percentile | ||||||||||
| Barium | ppm | 2 | 2 | 0.011 | 0.0083 - 0.0134 | NO | Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits | |||
| Fluoride | ppm | 4 | 4 | 1.11 | 0.1 - 1.57 | NO | Water additive which promotes strong teeth. Erosion of natural deposits | |||
| Chloramines | ppm | 4 | 4 | 1.8 | 0.0 - 2.94 | NO | Drinking water disinfectant | |||
| Chlorine | ppm | n /a | 4 - MRDL | 0.2 | 0.1 - 0.4 | NO | Drinking water disinfectant | |||
| Mercury | ppb | 2 | 2 | 0.1 | 0.0 - 0.2 | NO | Erosion of natural deposits; Discharge from refineries and factories; Runoff from landfills; Runoff from cropland. | |||
| Nitrate | ppm | 10 | 10 | 0.04 | 0.0 - 0.08 | NO | Erosion of natural deposits; Runoff from fertilizer; Sewage leaching from septic tanks | |||
| Turbidity | NTU | 0.3 | 0 | 0.09 | 0.02 - 0.18 | NO | Soil Runoff | |||
| Total Organic Carbon | mg/L | TT | N/A | 1.9 | 1.7 - 2.5 | NO | Naturally present in the environment | |||
| Organic Contaminants | ||||||||||
| Total Trihalomethanes (TTHMs) | ppb | n /a | 80 | 36 | 3.4 - 58 | NO | By-product of drinking water chlorination. | |||
| Total Haloacetic acids (5) | ppb | n /a | 60 | 20 | 4.7 - 32 | NO | By-product of drinking water chlorination. | |||
| The NH Department of Environmental Services (DES) has prepared a Source Assessment Report for the source servicing this community water system, assessing the sources vulnerability to contamination. The result of the assessment, prepared in September 2002, are as follows. Lake Massabesic, received four (4) high susceptibility ratings, four (4) medium susceptibility ratings, and five (5) low susceptibility ratings. The complete Assessment Report is available for inspection at DES or the following site: http://www.des.state.nh.us/dwspp/reports/MANCHESTER.pdf. | ||||||||||