New Hampshire Code of Administrative Rules
Env - Department of Environmental Services
Subtitle Env-Ws - Division of Water
Chapter Env-Ws 300 - NEW HAMPSHIRE DRINKING WATER RULES
Part Env-Ws 381 - CORROSION CONTROL TREATMENT, LEAD AND COPPER ACTION LEVELS
Section Env-Ws 381.30 - Lead and Copper Reduced Source Water Monitoring

Universal Citation: NH Admin Rules Env-Ws 381.30

Current through Register No. 13, March 27, 2025

(a) The owner of a water system using only groundwater may reduce the monitoring frequency for lead and copper in source water to once during each 9-year compliance cycle if:

(1) The system demonstrates that finished drinking water entering the distribution system has been maintained below the maximum permissible lead and copper concentrations specified by Env-Ws 381.12 during at least 3 consecutive compliance periods under Env-Ws 381.29; or

(2) The system demonstrates that, during at least 3 consecutive compliance periods in which sampling was conducted under Env-Ws 381.29, the concentration of lead in source water was less than or equal to 0.005 mg/L and the concentration of copper in source water was less than or equal to 0.65 mg/L.

(b) The owner of a water system using surface water, or a combination of surface water or ground water, may reduce the monitoring frequency in Env-Ws 381.29(b) and (c) to once during each 9-year compliance cycle if:

(2) The system demonstrates that during at least 3 consecutive years, the concentration of lead in source water was less than or equal to 0.005 mg/L and the concentration of copper in source water was less than or equal to 0.65 mg/L.

(c) The owner of a water system using a new source of water shall not be eligible for reducing monitoring for lead or copper until concentrations in samples collected from the new source during 3 consecutive monitoring periods are below the maximum permissible lead and copper concentrations specified in Env-Ws 381.12.

(See Revision Note at chapter heading for Env-Ws 300) #6521, eff 6-4-97, ss by #7734, eff 8-2-02

Disclaimer: These regulations may not be the most recent version. New Hampshire may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.