Louisiana Administrative Code › Title 51 - PUBLIC HEALTH-SANITARY CODE › Part XII - Water Supplies › Chapter 9 - Louisiana Total Coliform Rule › Section XII-903 - Coliform Routine Compliance Monitoring [formerly Coliform Routine Compliance Monitoring of Appendix C]

Current through Register Vol. 50, No. 6, June 20, 2024
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.
AUTHORITY NOTE:
				  Promulgated in accordance with
				  R.S.
				  40:4(A)(8) and
				  40:5.A.(2)(3)(5)(6)(17)(20).