N.H. Admin. Code § Env-Dw 811.12

Current through Register No. 50, December 12, 2024

Section Env-Dw 811.12 - Data Presentation: Specific Contaminants

For any of the following contaminants that is detected, the table shall:

(a) For E.coli:

(1) Identify the total number of positive samples;

(2) Provide information on the likely source of E.coli, which may be available in sanitary survey reports and source water assessments;

(3) Provide the source information language specified in Env-Dw 811.22 for E.coli, if the CWS O/O lacks specific information on the likely source(s) of contamination; and

(4) Provide the applicable health effects paragraph specified in Env-Dw 804;

(b) For lead or copper:

(1) Identify the 90^th percentile value of the most recent round of sampling;

(2) Identify the number of sampling sites exceeding the AL as defined in Env-Dw 714; and

(3) Identify the source of the lead or copper, or both, as applicable, using the source information language specified in Env-Dw 811.22;

(c) For turbidity:

(1) When a CWS O/O reports turbidity to the department pursuant to in Env-Dw 716, identify:

a. The highest average monthly value; and

b. The highest monthly value including an explanation of the reasons for measuring turbidity;

(2) Identify the highest single measurement and the lowest monthly percentage of samples meeting the turbidity limits specified in Env-Dw 716.04 or Env-Dw 716.08, as applicable, for the filtration technology being used; and

(3) When a CWS O/O is required to report pursuant to (c)(1)b. above, an explanation of the reasons for measuring turbidity; and

(d) For unregulated contaminants, except for cryptosporidium, for which monitoring is required:

(1) Identify the average and the range at which the contaminant was detected; and

(2) Explain the reasons for monitoring for unregulated contaminants.

N.H. Admin. Code § Env-Dw 811.12

(See Revision Note at chapter heading for Env-Dw 800) #9730, eff 6-30-10

Amended by Volume XXXV Number 06, Filed February 12, 2015 , Proposed by #10771, Effective 2/1/2015, Expires2/1/2025.

Amended by Volume XXXVIII Number 50, Filed December 13, 2018, Proposed by 12675, Effective 1/1/2019, Expires 1/1/2029.