| The source of the Maple Haven water supply is three wells and a pump house located off Nut Meadow Lane in Derry, NH. Well # 2 is located 169 feet north of the pump house. Well # 3 is located 90 feet northeast of the pump house. Well # 4 is located 200 feet northeast of the pump house. Treatment consist of phosphate addition to sequester iron and manganese and aid in corrosion control. | |||||||||
| MAPLE HAVEN | |||||||||
| EPA # 0612170 | |||||||||
| Inorganic Contaminants | Units | MCLG | MCL | Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |
| Fluoride | ppm | 4 | 4 | 0.43 | n/a | 2004 | NO | Erosion of natural deposits | |
| Radiological Contaminants | Units | MCLG | MCL | Average Level Detected | Range | Year | Violation Yes/No | Typical Source of Contaminant | |
| Gross Alpha (Compliance) | pCi/L | 0 | 15 | 0.6 | 0.0 - 2.4 | 2006 | NO | Erosion of natural deposits | |
| Combined Radium | pCi/L | 0 | 5 | 1 | 0.0 - 2.1 | 2006 | NO | Erosion of natural deposits | |
| Uranium | ppb | 0 | 30 | 2.9 | 2.2 - 3.8 | 2006 | NO | Erosion of natural deposits | |
| Radon | pCi/L | Not Regulated | 1,189 | n/a | 2001 | 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 | 0.17 | 0 of 5 | 2006 | NO | Corrosion of household plumbing system | |
| Source Assessment Information | |||||||||
| Summary of Susceptibility Factors | |||||||||
| Source Name | Date | Low | Med | High | |||||
| Bedrock Well # 2 | 11/3/00 | 9 | 0 | 3 | |||||
| Bedrock Well # 3 | 11/3/00 | 9 | 1 | 2 | |||||
| Bedrock Well # 4 | 11/3/00 | 9 | 0 | 3 | |||||
| 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 | |||||||||