Table 3.

Estimated daily doses through dermal contact and ingestion of water and consumption of P. annectens

Indices	Group	Sampling point	Fe	Mn	Cu	Zn	Cr	Cd	Pb
ADDIng (mg/L/day)	Adults	Ruliba station	3.64E−07	1.86E−07	8.40E−08	NA	NA	3.71E−08	1.79E−08
		Kirinda bridge	2.21E−07	7.00E−09	NA	3.15E−08	2.10E−08	NA	2.63E−07
		Giticyinyoni	5.50E−07	1.72E−07	1.02E−07	1.51E−07	5.25E−08	NA	2.07E−07
	Children	Ruliba station	1.93E−07	6.36E−08	2.88E−08	NA	NA	1.27E−08	6.12E−09
		Kirinda bridge	7.56E−08	2.40E−09	NA	1.08E−08	7.2E−09	NA	9.00E−08
		Giticyinyoni	1.88E−07	5.88E−08	3.48E−08	5.16E−08	1.8E−08	NA	7.08E−08
ADD Derm (mg/L/day)	Adults	Ruliba station	8.17E−05	2.69E−05	1.23E−05	NA	NA	5.38E−06	2.59E−06
		Kirinda bridge	3.20E−04	1.02E−06	NA	4.57E−06	3.05E−06	NA	3.81E−05
		Giticyinyoni	7.97E−05	2.49E−05	1.47E−05	2.18E−05	7.61E−06	NA	3.0E−05
	Children	Ruliba station	6.01E−05	1.98E−05	8.94E−06	NA	NA	3.96E−06	1.87E−06
		Kirinda bridge	2.35E−05	7.46E−07	NA	3.36E−06	2.24E−06	NA	2.80E−05
		Giticyinyoni	5.86E−05	1.83E−05	1.08E−05	1.61E−05	5.60E−05	NA	2.20E−05
EDI (mg/kg/day)	Adults	Ruliba station	4.54E−01	4.86E−01	1.50E−02	2.25E−01	2.46E−01	NA	7.19E−01
		Kirinda bridge	5.59E−01	5.04E−01	1.10E−02	7.4E−02	2.30E−01	NA	5.03E−01
	Children	Ruliba station	1.816E0	1.945E0	5.90E−02	9.00E−01	9.85E−01	NA	2.88E0
		Kirinda bridge	2.236E0	2.014E0	4.30E−02	2.98E−01	9.20E−01	NA	2.01E0
Dermal reference dose (mg/L/day) [12]			1.4E2	9.6E−01	1.2E−02	6.0E−02	6.0E−05	6.0E−05	5.25E−04
Oral reference dose (mg/kg/day) [11]			7.0E−01	3.0E−01	4.0E−02	3.0E−01	1.5E0	1.0E−03	1.4E−01

NA not applicable

Values in italics are higher than the reference doses of the heavy metals