La. Admin. Code tit. 51 § XII-903
Current through Register Vol. 50, No. 9, September 20, 2024
Section XII-903 - Coliform Routine Compliance Monitoring [formerly Coliform Routine Compliance Monitoring of Appendix C]A. Public water systems shall collect routine compliance samples for total coliforms at sites which are representative of water throughout the distribution system in accordance with a monitoring plan approved by the state health officer. Each public water system shall submit a monitoring plan in a format approved by the state health officer. The monitoring plan shall include a minimum number of point of collection (POC) monitoring sites calculated by multiplying 1.5 times the minimum number of samples required to be routinely collected in accordance with Subsection C of this Section, rounding any mixed (fractional) number product up to the next whole number. The monitoring plan shall include the POC monitoring sites for repeat samples required in §905 The monitoring plan shall include a map of the system with each POC sampling site identified along with a 911 street address, a latitude/longitude coordinate, and a brief description of the site location.B. The water supply must provide suitable taps which draw water directly from the mains or the service lines. Such taps provide for samples which are most representative of the quality of water provided without "interference" which may be caused by plumbing problems within residences or other structures. Use of such taps decreases the chance of "bad samples" resulting in a coliform maximum contaminant level (MCL) violation which requires public notification by the public water supply and an administrative enforcement action by the EPA/DHH against the public water supply.C. Community systems and non-community systems shall be routinely monitored in accordance with Table 1. Table 1 |
Population Served | Minimum Number of Routine Samples per Month | Population Served | Minimum Number of Routine Samples per Month |
25 to 1,000 | 1 | 59,001 to 70,000 | 70 |
1,001 to 2,500 | 2 | 70,001 to 83,000 | 80 |
2,501 to 3,300 | 3 | 83,001 to 96,000 | 90 |
3,301 to 4,100 | 4 | 96,001 to 130,000 | 100 |
4,101 to 4,900 | 5 | 130,001 to 220,000 | 120 |
4,901 to 5,800 | 6 | 220,001 to 320,000 | 150 |
5,801 to 6,700 | 7 | 320,001 to 450,000 | 180 |
6,701 to 7,600 | 8 | 450,001 to 600,000 | 210 |
7,601 to 8,500 | 9 | 600,001 to 780,000 | 240 |
8,501 to 12,900 | 10 | 780,001 to 970,000 | 270 |
12,901 to 17,200 | 15 | 970,001 to 1,230,000 | 300 |
17,201 to 21,500 | 20 | 1,230,001 to 1,520,000 | 330 |
21,501 to 25,000 | 25 | 1,520,001 to 1,850,000 | 360 |
25,001 to 33,000 | 30 | 1,850,001 to 2,270,000 | 390 |
33,001 to 41,000 | 40 | 2,270,001 to 3,020,000 | 420 |
41,001 to 50,000 | 50 | 3,020,001 to 3,960,000 | 450 |
50,001 to 59,000 | 60 | 3,960,001 or more | 480 |
D. Unless the state health officer specifies otherwise, the public water supply shall collect routine samples at regular time intervals throughout the month and shall alternate routine sampling between all of the approved POC sites. Routine samples shall not be collected from the same POC more than once per calendar month.E. Special purpose samples (investigative samples) shall not be used to determine compliance with the Escherichia coli (E. coli) MCL.La. Admin. Code tit. 51, § XII-903
Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 28:1333 (June 2002), Amended LR 42410 (3/1/2016), Amended by the Department of Health, Office of Public Health, LR 4386 (1/1/2017).AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(8) and 40:5.A.(2)(3)(5)(6)(17)(20).