| The source of the Gage Hill water supply is the Gage Hill well and pump house located on Vassar Drive off Route 38 in Pelham, NH. Bedrock well # 1 is located 3 feet east of the pump house. Treatment consists of chlorine for disinfection, packed tower aeration for radon removal, and phosphate addition to control corossion and sequester iron and manganese. | ||||||||||||||
| GAGE HILL | ||||||||||||||
| EPA # 1852020 | ||||||||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | ||||||
| Barium | ppm | 2 | 2 | 0.024 | n/a | 2004 | NO | Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits | ||||||
| Fluoride | ppm | 4 | 4 | 0.3 | n/a | 2004 | NO | Erosion of natural deposits | ||||||
| Nitrate as Nitrogen | ppm | 10 | 10 | 2.68 | n/a | 2006 | NO | Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits. | ||||||
| Volatile Organic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | ||||||
| Total Trihalomethanes (TTHMs) | ppb | n /a | 80 | 2 | n/a | 2006 | NO | By-product of drinking water chlorination. | ||||||
| Volatile Organic Contaminants | Units | MRDLG | MRDL | Average Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | ||||||
| Chlorine | ppm | 4 | 4 | 0.35 | nd to 0.6 | 2006 | NO | Water additive used to control microbes | ||||||
| Radiological Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | ||||||
| Gross Alpha (Compliance) | pCi/L | 0 | 15 | 7.2 | 1.0 to 7.2 | 2005 | NO | Erosion of natural deposits | ||||||
| Combined Radium | pCi/L | 0 | 5 | 0.8 | 0.6 to 0.8 | 2005 | NO | Erosion of natural deposits | ||||||
| Uranium | ppb | 0 | 30 | 22 | 15.9 to 22 | 2005 | NO | Erosion of natural deposits | ||||||
| Radon | pCi/L | Not Regulated | 458 | 451 to 458 | 2006 | 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. | ||||||||||||||
| Inorganic Contaminants | Units | MCLG | AL | 90th percentile sample value | # sites above AL | Year | Violation Yes/No | Typical Source of Contaminant | ||||||
| Copper | ppm | 1.3 | 1.3 | 0.131 | 0 | 2005 | NO | Corrosion of household plumbing system | ||||||
| Source Assessment Information | ||||||||||||||
| Summary of Susceptibility Factors | ||||||||||||||
| Source Name | Date | Low | Med | High | ||||||||||
| Bedrock Well # 1 | 12/17/01 | 9 | 2 | 1 | ||||||||||
| 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 | ||||||||||||||