Correction: Whiley, H., et al. Detection of Legionella, L. pneumophila and Mycobacterium Avium Complex (MAC) along Potable Water Distribution Pipelines. Int. J. Environ. Res. Public Health 2014, 11, 7393–7405

The authors wish to add the following amendments and corrections to their paper published in IJERPH [1].

Page 7398, Table 1: The average water temperature measured in summer is 24.3 °C not 4.3 °C. The correct Table 1 should therefore be:

Table 1. Average concentration of Legionella spp. L. pneumophila and MAC (mean ± standard deviation copies/mL) measured at each sampling point of Distribution system 1 (DS1) using qPCR. Total and free chlorine (mg/L) measured when samples were collected is also shown as well as the average water temperature for the month during which the sample was taken. The sampling points where a significant increase (p < 0.05) in the concentration of an organism compared to the concentration measured at sample point A within the same sampling period are also highlighted (*).

Season Sampled and Average Water Temperature	Sample Point	A	B	C	D	E
	Distance from Treatment Plant (km)	5	7	10	18	22
Summer 24.3 °C (n = 8)	Total Chlorine (mg/L)	1.4	0.7	1.1	0.4	0.4
	Free chlorine (mg/L)	1.2	0.6	0.1	0.2	0.2
	Average Legionella spp. (copies/mL)	37 ± 53	9 ± 4	3 ± 0	187 ± 22	+ 1238 ± 47
	Average L. pneumophila (copies/mL)	10 ± 8	3 ± 0	3 ± 0	375 ± 305	* 1981 ±298
	Average MAC (copies/mL)	36 ± 19	42 ± 19	* 31,813 ± 17,017	116 ± 118	+ 4395 ± 2176
Autumn 18.6 °C (n = 8)	Total chlorine (mg/L)	1.5	N/A	1.0	0.8	1.1
	Free chlorine (mg/L)	1.3	N/A	0.8	0.6	0.9
	Average Legionella spp. (copies/mL)	5 ± 4	N/A	41 ± 21	47 ± 13	46 ± 17
	Average L. pneumophila (copies/mL)	3 ± 0	N/A	3 ± 0	46 ± 68	+ 487 ± 406
	Average MAC (copies/mL)	25 ± 0	N/A	25 ± 0	200 ± 157	25 ± 0
Winter 13.6 °C (n = 8)	Total chlorine (mg/L)	1.2	N/A	1.3	0.4	0.7
	Free chlorine (mg/L)	1.1	N/A	1.3	0.3	0.6
	Average Legionella spp. (copies/mL)	22 ± 31	N/A	3 ± 0	5 ± 1	3 ± 0
	Average L. pneumophila (copies/mL)	81 ± 134	N/A	3 ±1	3 ± 0	3 ± 0
	Average MAC (copies/mL)	25 ±0	N/A	25 ± 0	25 ± 0	25 ± 0
Spring 20.3 °C (n = 8)	Total chlorine (mg/L)	1.0	0.7	0.3	0.4	0.7
	Free chlorine (mg/L)	0.9	0.6	0.2	0.3	0.6
	Average Legionella spp. (copies/mL)	43 ± 69	120 ± 151	8 ± 3	93 ± 139	6 ± 6
	Average L. pneumophila (copies/mL)	36 ± 34	15 ± 12	9 ± 1	166 ± 122	3 ± 0
	Average MAC (copies/mL)	2468 ± 317	2224 ± 2342	1112 ± 328	294 ± 58	101 ± 69

N/A sample was not available to be collected at this time. * statistically significant increase. ⁺ an increase of concentration by an order of magnitude. The lack of statistical significance (p > 0.05) is possible due to the large variance in environmental samples shown by the standard deviation.

Table 1. Average concentration of Legionella spp. L. pneumophila and MAC (mean ± standard deviation copies/mL) measured at each sampling point of Distribution system 1 (DS1) using qPCR. Total and free chlorine (mg/L) measured when samples were collected is also shown as well as the average water temperature for the month during which the sample was taken. The sampling points where a significant increase (p < 0.05) in the concentration of an organism compared to the concentration measured at sample point A within the same sampling period are also highlighted (*).

Season Sampled and Average Water Temperature	Sample Point	A	B	C	D	E
	Distance from Treatment Plant (km)	5	7	10	18	22
Summer 24.3 °C (n = 8)	Total Chlorine (mg/L)	1.4	0.7	1.1	0.4	0.4
	Free chlorine (mg/L)	1.2	0.6	0.1	0.2	0.2
	Average Legionella spp. (copies/mL)	37 ± 53	9 ± 4	3 ± 0	187 ± 22	+ 1238 ± 47
	Average L. pneumophila (copies/mL)	10 ± 8	3 ± 0	3 ± 0	375 ± 305	* 1981 ±298
	Average MAC (copies/mL)	36 ± 19	42 ± 19	* 31,813 ± 17,017	116 ± 118	+ 4395 ± 2176
Autumn 18.6 °C (n = 8)	Total chlorine (mg/L)	1.5	N/A	1.0	0.8	1.1
	Free chlorine (mg/L)	1.3	N/A	0.8	0.6	0.9
	Average Legionella spp. (copies/mL)	5 ± 4	N/A	41 ± 21	47 ± 13	46 ± 17
	Average L. pneumophila (copies/mL)	3 ± 0	N/A	3 ± 0	46 ± 68	+ 487 ± 406
	Average MAC (copies/mL)	25 ± 0	N/A	25 ± 0	200 ± 157	25 ± 0
Winter 13.6 °C (n = 8)	Total chlorine (mg/L)	1.2	N/A	1.3	0.4	0.7
	Free chlorine (mg/L)	1.1	N/A	1.3	0.3	0.6
	Average Legionella spp. (copies/mL)	22 ± 31	N/A	3 ± 0	5 ± 1	3 ± 0
	Average L. pneumophila (copies/mL)	81 ± 134	N/A	3 ±1	3 ± 0	3 ± 0
	Average MAC (copies/mL)	25 ±0	N/A	25 ± 0	25 ± 0	25 ± 0
Spring 20.3 °C (n = 8)	Total chlorine (mg/L)	1.0	0.7	0.3	0.4	0.7
	Free chlorine (mg/L)	0.9	0.6	0.2	0.3	0.6
	Average Legionella spp. (copies/mL)	43 ± 69	120 ± 151	8 ± 3	93 ± 139	6 ± 6
	Average L. pneumophila (copies/mL)	36 ± 34	15 ± 12	9 ± 1	166 ± 122	3 ± 0
	Average MAC (copies/mL)	2468 ± 317	2224 ± 2342	1112 ± 328	294 ± 58	101 ± 69

N/A sample was not available to be collected at this time. * statistically significant increase. ⁺ an increase of concentration by an order of magnitude. The lack of statistical significance (p > 0.05) is possible due to the large variance in environmental samples shown by the standard deviation.

The authors would like to apologize for any inconvenience caused to the readers by these changes.