Table 2.

Concentrations of metals in water samples from community treatment plants collected during the transition from late hot to early rainy season (16 July–8 August 2022) (First sample collection).

Community Name	Metal Contaminant (mg/mL)
	Al		Cr <0.05 mg/L		Mn <0.3 mg/L		Fe <0.3 mg/L		Co		Cu <2.0 mg/L		As <0.01 mg/L		Cd <0.003 mg/L		Pb <0.01 mg/L		Hg <0.001 mg/L
	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet	Inlet	Outlet
Don Chang	ND	0.684	0.008	0.009	0.558	0.456	0.164	0.108	ND	ND	0.007	0.024	ND	ND	0.014	0.012	0.075	0.054	ND	ND
Ban Pa Lueam	ND	0.145	0.008	0.009	0.126	0.069	0.111	0.076	0.014	ND	0.017	0.006	0.118	ND	ND	0.003	0.015	ND	0.008	0.003
Kok Samran	ND	0.046	0.010	ND	0.280	0.034	0.098	0.032	ND	0.009	0.001	0.012	ND	0.062	0.007	0.009	0.119	0.187	0.008	0.004
Ban Nong Makhuea	0.147	0.018	0.008	ND	0.253	0.076	0.274	0.043	0.005	ND	0.016	ND	0.050	ND	ND	0.004	0.159	0.015	0.006	0.003
Ban Don Po Daeng	ND	0.695	0.003	0.005	0.122	0.081	0.259	0.066	0.005	ND	0.006	ND	0.097	0.059	0.014	0.006	0.163	0.053	0.011	0.002
Ban Nong Bua Noi	0.134	-	0.003	-	0.001	-	0.020	-	0.028	-	ND	-	0.063	-	0.007	-	0.094	-	0.008	-
Ban Huai Suea Ten	ND	ND	0.002	0.009	0.053	0.079	0.187	0.153	0.011	0.011	0.007	ND	ND	0.138	ND	0.012	0.065	0.229	0.017	0.005
Kok Nam Kliang	ND	ND	0.003	0.004	1.143	0.520	0.112	0.814	0.004	ND	0.007	0.016	0.028	0.211	0.002	ND	0.081	0.077	0.006	ND
Sri Suk	1.048	0.165	0.010	0.007	0.271	0.122	0.374	0.268	ND	0.005	0.008	0.016	0.168	ND	0.011	0.012	ND	0.132	0.090	0.012
Ban Nong Tae	0.003	0.148	0.002	0.008	0.064	0.026	0.095	0.046	0.001	ND	ND	ND	0.132	0.109	0.003	0.011	0.142	0.110	0.061	0.008
Huai Sai	0.045	1.048	ND	0.008	0.057	0.052	0.073	0.039	0.001	ND	0.001	0.019	ND	0.019	0.004	0.004	0.191	0.168	0.125	0.007
Ban Sub Somboon	ND	ND	0.009	0.005	0.007	0.007	0.029	0.133	0.002	0.003	ND	0.012	0.246	0.015	ND	0.001	0.109	0.157	0.044	0.007
Na Kham	ND	-	0.018	-	0.022	-	0.015	-	0.015	-	0.017	-	0.015	-	0.015	-	0.014	-	3.269	-

‘Red’ indicates contaminant levels exceeding water quality standards; ‘ND’ means not detected via standard ICP-MS and AAS methods; ‘-’ signifies untested; Aluminum and Cobalt are not in standard criteria.