| PEU/LONDONDERRY | |||||||||
| EPA # 1391010 | |||||||||
| 2010 CONTAMINANT RESULTS | |||||||||
| Regulated Substances Substance (Unit of Measure) | Year Sampled | MCL | MCLG | Level Detected | Range Low-High | Violation Yes/No | Typical Source of Contaminant | ||
| Alph Emitters (pCi/L) | 2010 | 15 | 0 | 1.7 | 1.7 - 1.7 | NO | Erosion of natural deposits | ||
| Barium (ppm) | 2010 | 2 | 2 | 0.009 | 0.007 - 0.01 | NO | Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits | ||
| Bromates (ppb) | 2010 | 10 | 0 | 1.1 | ND - 1.1 | NO | By-product of drinking water chlorination. | ||
| Chloramines (ppm) | 2010 | 4 | 4 | 1.03 | 0.01 - 2.2 | NO | Water additive used to control microbes. | ||
| Chlorine (ppm) | 2010 | 4 - MRDL | n /a | 0.81 Avg | 0.46 - 1.25 | NO | Drinking water disinfectant | ||
| Fluoride (ppm) | 2010 | 4 | 4 | 1.1 | 0.05 - 1.5 | NO | Water additive which promotes strong teeth. | ||
| Total Haloacetic acids (ppb) | 2008 | 60 | n /a | 4.1 Avg | < 1 - 11 | NO | By-product of drinking water chlorination. | ||
| Total Organic Carbon (ppm) | 2010 | TT | n /a | 2 | 1.7 - 2.2 | NO | Naturally present in the environment | ||
| Total Trihalomethanes (ppb) | 2008 | 80 | n /a | 1.6 Avg | < 1 - 3.4 | NO | By-product of drinking water chlorination. | ||
| Turbidity (NTU) | 2010 | TT | n /a | 0.09 | 0.04 - 0.09 | NO | Soil Runoff - a measurement of cloudiness of the water and a way to judge treatment efficency. | ||
| Turbidity (Lowest monthly percent of samples meeting limit) | 2010 | TT | n /a | 100 | n/a | NO | Soil Runoff - a measurement of cloudiness of the water and a way to judge treatment efficency. | ||
| Regulated Substances Substance (Unit of Measure) | Year Sampled | Action Level (AL) | MCLG | Amount Detected 90th Percentile | Sites Above AL/Total Sites | Violation Yes/No | Typical Source of Contaminant | ||
| Copper (ppm) | 2009 | 1.3 | 1.3 | 0.036 | 0/5 | NO | Corrosion of household plumbing system; erosion of natural deposits; Leaching from wood preservatives | ||
| Lead (ppb) | 2009 | 15 | 0 | 6.5 | 0/5 | NO | Corrosion of household plumbing system; erosion of natural deposits | ||
| 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://des.nh.gov/organization/divisions/water/dwgb/dwspp/reports/documents/manchester.pdf | |||||||||
| What is the source of my drinking water? | |||||||||
| The source of the Londonderry 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. Manchester's Consumer Confidence Report can be found at the following website http://www.manchesternh.gov/website/Departments/WaterWorks/ConsumerConfidence/tabid/410/Default.aspx | |||||||||