| The source of the Great Bay water supply is 2 wells and pump house located between Turkey Ridge Road and Schanda Drive in Newmarket, NH. Bedrock Well # 1 is located 840 feet northeast of the pump house. Bedrock Well # 3 is located 700 feet northeast of the pump house. There is curently no water treatment. | |||||||||||||||||
| GREAT BAY | |||||||||||||||||
| EPA # 1732030 | |||||||||||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |||||||||
| Barium | ppm | 2 | 2 | 0.011 | n/a | 2005 | NO | Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits | |||||||||
| Nitrate as Nitrogen | ppm | 10 | 10 | 0.77 | n/a | 2006 | NO | Runoff from fertilizer use; leaching from septic tanks, sewage; 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 | 2.3 | 1.0 - 2.3 | 2004 | NO | Erosion of natural deposits | |||||||||
| Combined Radium | pCi/L | 0 | 5 | 1.5 | 0.2 - 1.5 | 2004 | NO | Erosion of natural deposits | |||||||||
| Uranium | ppb | 0 | 30 | 1.9 | 0.6 - 1.9 | 2004 | NO | Erosion of natural deposits | |||||||||
| Radon | pCi/L | Not Regulated | 1,310 | n/a | 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. | |||||||||||||||||
| 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 | 0.157 | 0 | 2006 | NO | Corrosion of household plumbing system | |||||||||
| Source Assessment Information | |||||||||||||||||
| Summary of Susceptibility Factors | |||||||||||||||||
| Source Name | Date | Low | Med | High | |||||||||||||
| Bedrock Well # 1 | 11/26/01 | 9 | 1 | 2 | |||||||||||||
| Bedrock Well # 3 | 11/26/01 | 9 | 1 | 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 | |||||||||||||||||