Journal of Environmental and Public Health

Research Article

Disinfection Byproducts in Drinking Water and Evaluation of Potential Health Risks of Long-Term Exposure in Nigeria

Table 3

(a) Exposure assessment of THMs (mg/kg-day) through ingestion in adults


Sites	Jan.			Feb.			March			April			May
Sites	TCM × 10⁻²	BDCM × 10⁻⁵	DBCM × 10⁻⁵	TCM × 10⁻²	BDCM × 10⁻⁵	DBCM	TCM × 10⁻²	BDCM × 10⁻⁵	DBCM	TCM × 10⁻³	BDCM × 10⁻⁵	DBCM	TCM × 10⁻³	BDCM	DBCM

OWP	4.51	—	—	4.31	—	—	2.54	—	—	1.41	—	—	1.37	—	—
OWS	4.34	—	—	4.01	—	—	2.63	1.85	—	1.28	1.85	—	1.54	—	—
LWP	3.23	1.89	1.72	4.07	1.89	—	2.81	—	—	9.90	—	—	1.23	—	—
LWS	3.73	—	—	3.72	—	—	3.83	—	—	1.29	—	—	1.21	—	—
HWP	3.41	—	—	4.15	—	—	3.52	1.85	—	1.27	—	—	1.49	—	—
HWS	3.67	—	—	3.94	—	—	3.63	—	—	1.36	—	—	1.32	—	—
SWP	4.52	—	—	4.09	—	—	2.63	—	—	1.30	—	—	1.47	—	—
SWS	4.29	—	—	3.22	—	—	2.67	—	—	1.45	—	—	1.45	—	—

(b) Exposure assessment of THMs (mg/kg-day) through ingestion in children (6–18 years)


Sampling sites	Jan.			Feb.			March			April			May
Sampling sites	TCM × 10⁻²	BDCM × 10⁻⁵	DBCM × 10⁻⁵	TCM × 10⁻²	BDCM × 10⁻⁵	DBCM	TCM × 10⁻²	BDCM × 10⁻⁵	DBCM	TCM × 10⁻³	BDCM × 10⁻⁵	DBCM	TCM × 10⁻³	BDCM	DBCM

OWP	3.98	—	—	3.81	—	—	2.24	—	—	1.25	—	—	1.22	—	—
OWS	3.83	—	—	3.55	—	—	2.32	1.64	—	1.13	1.64	—	1.36	—	—
LWP	2.86	1.68	1.51	3.59	1.67	—	2.48	—	—	0.87	—	—	1.09	—	—
LWS	3.29	—	—	3.29	—	—	3.38	—	—	1.13	—	—	1.07	—	—
HWP	3.01	—	—	3.66	—	—	3.10	1.64	—	1.12	—	—	1.31	—	—
HWS	3.25	—	—	3.48	—	—	3.21	—	—	1.19	—	—	1.17	—	—
SWP	3.99	—	—	3.62	—	—	2.49	—	—	1.15	—	—	1.29	—	—
SWS	3.79	—	—	2.84	—	—	2.36	—	—	1.28	—	—	1.28	—	—