| Ministerial | EPA # 1392310 | ||||||||
| Inorganic Contaminants | Date(s) Collected | Highest Detect | Range Detected | MCL or MRDL | MCLG or MRDLG | Violation Yes/No | Typical Source of Contaminant | ||
| Fluoride (ppm) | 11/4/10 | 1.09 | N/A | 4 | 4 | No | Erosion of natural deposits | ||
| Sodium (ppm) | 11/1/07 | 18.4 | N/A | Not Regulated | N/A | Natural sources; runoff from use as salt on roadways; by-product of treatment process | |||
| Volatile Organic Contaminants | |||||||||
| Chlorine (ppm) | 2010 | 0.35 Avg | 0.1 - 0.8 | 4 | 4 | No | Water additive used to control microbes | ||
| Radiological Contaminants | |||||||||
| Compliance Gross Alpha (pCi/L) | 2005 | 2.8 | 1.5 - 2.8 | 15 | 0 | No | Erosion of natural deposits | ||
| Radium 226 & 228 (pCi/L) | 2005 | 1.7 | 1.2 - 1.7 | 5 | 0 | No | Erosion of natural deposits | ||
| Uranium (ppb) | 2005 | 3.1 | 1.9 - 3.1 | 30 | 0 | No | Erosion of natural deposits | ||
| Radon (pCi/L) | 4/21/10 | 3,140 | N/A | Not Regulated | N/A | Erosion of natural deposits | |||
| Date(s) Collected | 90th Percentile | Action Level | MCLG | # of Sites Sampled | # Sites Above Action Level | Violation Yes/No | Typical Source of Contaminant | ||
| Lead (ppb) | 5/13/09 | < 5 | 15 | 0 | 6 | 0 | No | Corrosion of household plumbing system | |
| Copper (ppm) | 5/13/09 | 0.181 | 1.3 | 1.3 | 6 | 0 | No | Corrosion of household plumbing system | |
| What is the source of my drinking water? | |||||||||
| The source of the Ministerial water supply is two wells and a pump station located on Faye Lane in Derry, NH. Well # 1 is located 550 feet northwest of the pump house. Well # 2 is located 610 feet northwest of the pump house. Treatment consists of chlorine addition to kill bacteria, aeration to remove radon from the water, and oxidation/filtration to remove iron and manganese (installed 3/5/08). | |||||||||
| Source Water Assessment Summary | |||||||||
| Summary of Susceptibility Factors | |||||||||
| Source Name | Date | Low | Med | High | |||||
| Bedrock Well # 1 | 3/15/02 | 11 | 1 | 0 | |||||
| Bedrock Well # 2 | 3/15/02 | 11 | 1 | 0 | |||||
| The complete Assessment Report is available for review. For more information call Gary Tetley at 800-553-5191 ext. 2378 or visit NH Department of Environmental Services Drinking Water and Groundwater Bureau web site at http://www.des.nh.gov/organization/divisions/water/dwgb/dwspp/reports/index.htm | |||||||||