| The source of the Litchfield water supply is the Dame, Ducharme, and Weinstein wells, located in Litchfield. A supplementary source of water is the Pennichuck Pond System during peak demand periods. Treatment for the three well supplies consist of chlorine for disinfection and pH adjustment and phosphate addition for corrosion control and iron and manganese sequestration. | |||||||||||||
| LITCHFIELD | |||||||||||||
| EPA # 1371010 | |||||||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||||
| Nitrate as Nitrogen | ppm | 10 | 10 | 2.26 | 0.34 to 2.26 | 2006 | NO | Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits. | |||||
| Barium | ppm | 2 | 2 | 0.011 | n/a | 2005 | NO | Erosion of natural deposits | |||||
| Radiological Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||||
| Gross Alpha (Compliance) | pCi/L | 0 | 15 | 1.2 | nd to 1.2 | 2006 | NO | Erosion of natural deposits | |||||
| Uranium | ug/L | 0 | 30 | 1.3 | nd to 1.3 | 2006 | NO | Erosion of natural deposits | |||||
| Radium 226 & 228 | pCi/L | 0 | 5 | 1.56 | nd to 1.56 | 2006 | NO | Erosion of natural deposits | |||||
| Radon | pCi/L | Not Regulated | 1029 | 576 - 1029 | 2002 | n/a | Erosion of natural deposits | ||||||
| Radon is a radioactive gas that you can't see, taste or smell. It can move up through the ground and into a home through cracks and holes in the foundation. Radon can also get into indoor air when released from tap water from showering, washing dishes, and other household activities. It is a known human carcinogen. Breathing radon can lead to lung cancer. Drinking water containing radon may cause an increased risk of stomach cancer. Presently EPA is reviewing a standard for radon in water. | |||||||||||||
| Lead & Copper | Units | MCLG | AL | 90th percentile sample value | Year | Violation Yes/No | # sites above AL | Typical Source of Contaminant | |||||
| Lead | ppb | 0 | 15 | < 5 | 2005 | NO | 0 of 10 | Corrosion of household plumbing system | |||||
| Copper | ppm | 1.3 | 1.3 | 0.734 | 2005 | NO | 0 of 10 | Corrosion of household plumbing system | |||||
| Organic Contaminants | Units | MCLG | MCL | Average Level Detected | Range | Year | Violation Yes/No | Typical Source of Contamination | |||||
| Total Trihalomethanes (TTHMs) | ppb | 0 | 80 | 19.9 | 6.5 to 52 | 2004 | NO | By-product of drinking water chlorination | |||||
| Haloacetic Acids (HAA5) | ppb | 0 | 60 | 2.7 | nd to 5 | 2004 | NO | By-product of drinking water chlorination | |||||
| Volatile Organic Contaminants | Units | MRDLG | MRDL | Distribution System Average | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||||
| Chlorine | ppm | 4 | 4 | 0.38 | 0.12 to 0.54 | 2006 | NO | Water additive used to control microbes | |||||
| Source Assessment Information | |||||||||||||
| Summary of Susceptibility Factors | |||||||||||||
| Source Name | Date | Low | Med | High | |||||||||
| Gravel Pack Well - Weinstein | 12/11/00 | 9 | 2 | 1 | |||||||||
| Gravel Pack Well - Dame | 12/11/00 | 9 | 1 | 2 | |||||||||
| Gravel Pack Well - Ducharme | 12/11/00 | 7 | 3 | 2 | |||||||||
| The complete Assessment Report is available for inspection. For more information call Gary Tetley or visit NH DES's Drinking Water Source Assessment Program web site at www.des.state.nh.us/dwspp | |||||||||||||