| Richardson | EPA # 0612130 | ||||||||
| Inorganic Contaminants | Date(s) Collected | Highest Detect | Range Detected | MCL or MRDL | MCLG or MRDLG | Violation Yes/No | Typical Source of Contaminant | ||
| Arsenic (ppb) | 9/16/09 | 3 | N/A | 10 | N/A | No | Erosion of natural deposits; runoff from orchards; runoff from glass and electronics production wastes. | ||
| Fluoride (ppm) | 9/16/09 | 0.27 | N/A | 4 | 4 | No | Erosion of natural deposits | ||
| Sodium (ppm) | 9/16/09 | 13.6 | N/A | Not Regulated | N/A | Natural sources; runoff from use as salt on roadways; by-product of treatment process | |||
| Radiological Contaminants | |||||||||
| Compliance Gross Alpha (pCi/L) | 2005 | 8.4 | nd - 8.4 | 15 | 0 | No | Erosion of natural deposits | ||
| Radium 226 & 228 (pCi/L) | 2005 | 2.5 | 0.9 - 2.5 | 5 | 0 | No | Erosion of natural deposits | ||
| Uranium (ppb) | 2005 | 5.1 | 1.0 - 5.1 | 30 | 0 | No | Erosion of natural deposits | ||
| Radon (pCi/L) | 4/20/10 | 1,400 | 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) | 7/21/09 | < 5 | 15 | 0 | 5 | 0 | No | Corrosion of household plumbing system | |
| Copper (ppm) | 7/21/09 | 0.131 | 1.3 | 1.3 | 5 | 0 | No | Corrosion of household plumbing system | |
| What is the source of my drinking water? | |||||||||
| The source of the Richardson water supply is one well located off Richardson Road in Derry, NH. The well is located 20 feet north of the pump house. The water does not require treatment. | |||||||||
| Source Water Assessment Summary | |||||||||
| Summary of Susceptibility Factors | |||||||||
| Source Name | Date | Low | Med | High | |||||
| Bedrock Well 1 | 11/3/00 | 10 | 2 | 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 | |||||||||