Salinization and arsenic contamination of surface water in southwest Bangladesh

Ayers, John C.; George, Gregory; Fry, David; Benneyworth, Laura; Wilson, Carol; Auerbach, Leslie; Roy, Kushal; Karim, Md. Rezaul; Akter, Farjana; Goodbred, Steven

doi:10.1186/s12932-017-0042-3

Geochemical Transactions

Table 2 Water sample compositions

From: Salinization and arsenic contamination of surface water in southwest Bangladesh

Loc	Date	Type	T (°C)	Eh (mV)	pH	SpC (mS/cm)	Salinity (ppt)	Al	As	B	Ba	Ca	Fe	K	Li	Mg
Blank 1	10/19/2012	Blank								0.002	0.002	0.2		0.0		0.1
Blank 2	10/18/2012	Blank									0.002	0.007		0.004
Blank 3	5/13/2012	Blank							0.006		0.002	0.1		0.1		0.1
Blank 4	5/13/2012	Blank						0.1		0.053	0.008	1.8	0.014	0.4		0.8
SW-06	5/14/2012	FP	34.6	436	8.06	1.84	0.77	0.06	0.007	0.09	0.07	56	0.116	18.1	0.007	39.8
SW-06	10/15/2012	FP	31.8	360	8.66	1.27	0.55	0.02	0.006	0.10	0.04	46		11.1	0.003	25.2
SW-06	10/24/2013	FP	28.3	170	7.7	1.09	0.50	0.02	0.006	0.09	0.02	33		9.5		21.5
SW-07	10/15/2012	FP	29.6	363	8.64	5.14	2.51		0.006	0.45	0.04	50		42.9	0.013	92.9
SW-08	5/16/2012	FP	31.1	395	7.69	1.76	0.79	0.01	0.003	0.10	0.05	73	0.007	20.7	0.011	40.7
SW-08	10/15/2012	FP	30.2	348	8.6	1.41	0.63	0.02	0.006	0.13	0.03	67		13.2	0.004	32.5
SW-101	5/7/2013	FP	34.1	167	8.56	4.48	1.98	0.08	0.059	0.86	0.15	248	0.025	95.9	0.024	250.7
SW-11	5/17/2012	FP	32.7	397	7.39	1.29	0.55	0.04	0.013	0.05	0.10	59	0.025	23.5	0.009	34.1
SW-12	5/17/2012	FP	35.9	396	8.45	1.02	0.41	0.01	0.020	0.02	0.03	70	0.018	27.4	0.008	32.8
SW-12	10/16/2012	FP	31.4	372	8.83	1.79	0.79	0.04	0.004	0.10	0.04	105	0.003	26.0	0.005	50.2
SW-17	5/18/2012	FP	33.5	365	7.37	2.23	0.96	0.01	0.009	0.15	0.10	45	0.018	27.6	0.008	43.4
SW-17	10/16/2012	FP	32.9	305	8.61	2.23	0.97		0.037	0.22	0.04	54	0.003	16.2	0.007	46.8
SW-17	5/7/2013	FP	32.2	93	9.16	2.61	1.16	0.03	0.006	0.27	0.08	45	0.015	24.5		49.5
SW-17	10/25/2013	FP	29.3	126	7.4	1.90	0.88	0.01	0.011	0.18	0.01	32		15.4		36.1
SW-18	5/18/2012	FP	34.3	350	7.1	2.29	0.97	0.00	0.019	0.11	0.08	60	0.019	20.1	0.007	42.5
SW-18	10/16/2012	FP	32.6	261	8.95	1.74	0.75	0.03	0.009	0.11	0.05	63	0.009	11.9	0.003	33.4
SW-18	5/7/2013	FP	32.9	23	8.74	2.19	0.95	0.04	0.021	0.19	0.08	67	0.010	16.4		40.4
SW-18	10/25/2013	FP	29.3	184	7.75	1.28	0.59	0.02	0.009	0.10	0.03	44		9.0		22.7
SW-19	5/19/2012	FP	31.8	411	8.14	1.88	0.83	0.01	0.049	0.06	0.09	88	0.007	30.3	0.011	35.9
SW-19	10/16/2012	FP	29.8	378	8.62	1.54	0.70	0.02	0.027	0.09	0.05	73		19.8	0.004	28.6
SW-19	5/6/2013	FP	30.7	124	9.28	2.36	1.07	0.04	0.027	0.15	0.14	113	0.006	31.8	0.013	41.8
SW-19	10/23/2013	FP	29.6	170	8.18	1.96	0.91	0.04	0.020	0.10	0.06	86	0.012	22.2		36.6
SW-21	5/20/2012	FP	33.1	414	7.45	1.65	0.71	0.01	0.009	0.07	0.06	51	0.002	22.2	0.006	36.9
SW-21	10/17/2012	FP	29.9	379	8.07	1.23	0.55	0.02	0.008	0.11	0.04	42	0.002	14.1	0.004	28.1
SW-22	5/20/2012	FP	33.0	415	7.55	1.65	0.71	0.01	0.015	0.07	0.05	49	0.003	21.8	0.008	36.9
SW-22	10/26/2013	FP	26.8	213	7.36	1.14	0.54	0.02	0.003	0.09	0.03	36		11.9		25.5
SW-25	5/20/2012	FP	38.0	415	7.88	4.35	1.79	0.02	0.012	0.21	0.08	91		39.1	0.012	88.8
SW-25	10/17/2012	FP	30.1	286	8.97	1.87	0.85	0.01	0.006	0.09	0.02	42	0.005	10.8	0.003	30.2
SW-25	5/7/2013	FP	33.5	125	8.78	3.31	1.46	0.02	0.038	0.23	0.01	50	0.007	24.4		66.3
SW-27	5/21/2012	FP	33.5	433	7.28	2.92	1.28	0.00	0.006	0.17	0.06	42	0.002	29.9	0.008	52.9
SW-27	10/19/2012	FP	30.4	266	8.2	1.88	0.85	0.01	0.011	0.17	0.03	30	0.004	15.9	0.003	32.6
SW-27	5/5/2013	FP	30.0	86	7.95	2.56	1.19	0.02		0.22	0.06	43		21.0		36.5
SW-27	10/26/2013	FP	26.8	140	7.3	1.21	0.58	0.01	0.004	0.11	0.01	18	0.008	10.2		20.7
SW-30	5/22/2012	FP	31.8	410	8.73	2.00	0.89	0.00	0.017	0.09	0.07	39	0.005	21.5	0.007	32.3
SW-30	10/19/2012	FP	32.3	336	8.64	1.47	0.63	0.02	0.007	0.14	0.06	45	0.002	13.9	0.004	29.5
SW-30	5/8/2013	FP	30.6	58	8.36	2.17	0.99	0.03	0.006	0.21	0.09	64	0.008	20.7		40.3
SW-33	5/23/2012	FP	31.0	444	7.94	8.14	3.98	0.02	0.038	0.58	0.11	120	0.011	92.3	0.012	167.7
SW-33	10/18/2012	FP	32.8	275	9.21	2.48	1.09	0.01	0.008	0.28	0.05	59	0.013	28.2	0.007	49.0
SW-33	5/5/2013	FP	31.6	163	8.48	6.29	2.99	0.04		0.67	0.13	106	0.010	70.7	0.008	127.0
SW-33	10/27/2013	FP	28.4	96	8.05	1.87	0.88	0.02	0.003	0.18	0.03	41		19.7		33.1
SW-52	10/15/2012	FP	32.0	349	8.97	1.41	0.61	0.02	0.012	0.12	0.05	58		14.4	0.005	32.1
SW-52	10/24/2013	FP	31.0	152	8.44	1.30	0.57	0.03	0.007	0.10	0.04	58	0.002	13.1		29.3
SW-63	10/19/2012	FP	29.1	218	8.53	1.89	0.88	0.05	0.007	0.16	0.07	35	0.003	23.5	0.003	28.2
SW-70	10/27/2013	FP	28.4	143	7.72	1.02	0.47	0.02	0.003	0.09	0.02	37		10.0		25.6
SW-09	10/15/2012	RP	28.6	356	8.17	3.91	1.92		0.015	0.51	0.04	50		33.3	0.012	68.1
SW-14	10/25/2013	RP	28.7	154	7.41	2.88	1.38					1		0.2		0.6
SW-16	10/16/2012	RP	37.8	322	9.45	0.67	0.26	0.06	0.005	0.08	0.02	31	0.074	9.5	0.004	16.5
SW-20	10/16/2012	RP	29.2	391	8.01	1.73	0.80	0.02	0.007	0.17	0.05	57	0.003	16.7	0.007	39.2
SW-20	10/23/2013	RP	28.9	188	7.32	0.93	0.42	0.02		0.09	0.03	44		7.0		21.5
SW-24	10/17/2012	RP	30.4	295	8.61	1.45	0.65	0.02	0.003	0.14	0.04	36	0.005	15.3	0.004	28.5
SW-31	10/18/2012	RP	30.7	244	8.24	2.00	0.90	0.02	0.011	0.19	0.04	42	0.002	19.7	0.007	41.4
SW-31	10/27/2013	RP	25.3	173	7.25	1.61	0.81	0.01		0.16	0.02	24		15.7		27.8
SW-34	10/18/2012	RP	33.4	261	9.25	2.43	1.05	0.04	0.039	0.24	0.06	49	0.011	18.6	0.008	48.4
SW-35	10/16/2012	RP	28.5	393	8.31	0.82	0.38	0.01	0.002	0.13	0.04	31	0.003	14.5	0.004	25.6
SW-35	10/23/2013	RP	28.7	190	7.27	1.51	0.70	0.02	0.002	0.15	0.05	53	0.008	10.3		29.8
SW-51	10/15/2012	RP	33.6	309	8.72	1.57	0.66	0.03	0.003	0.15	0.04	51	0.009	13.3	0.004	37.6
SW-53	10/15/2012	RP	30.5	349	8.19	0.66	0.29	0.01	0.002	0.06	0.04	34		7.0	0.003	16.6
SW-53	10/25/2013	RP	29.8	189	7.36	1.51	0.69	0.02	0.002	0.13	0.04	48		8.3		31.0
SW-55	10/17/2012	RP	29.3	228	8.06	1.97	0.92	0.02	0.011	0.20	0.05	56	0.004	17.0	0.005	45.4
SW-59	10/17/2012	RP	32.5	333	8.89	4.33	1.97	0.02	0.005	0.30	0.07	107	0.006	31.3	0.008	91.7
SW-60	10/17/2012	RP	32.5	333	8.89	4.33	1.97	0.01	0.003	0.30	0.08	106	0.014	30.9	0.008	89.8
SW-65	10/19/2012	RP	32.5	259	8.58	1.34	0.58	0.02	0.003	0.11	0.04	43	0.009	10.9	0.004	29.5
RW-02	10/26/2013	RW	22.5	212	6.56	0.01	0.01	0.01			0.02	1	0.011	0.1		0.1
RW-03	10/26/2013	RW	22.3	213	6.6	0.01	0.01					1		0.1		0.1
RW-04	10/27/2013	RW	26.3	95	8.72	0.08	0.04	0.12			0.00	10		3.2		0.3
SW-07	5/16/2012	SP	30.2	419	8.35	31.34	17.46	0.05	0.002	2.23	0.24	299	0.006	368.6	0.007	771.3
SW-09	5/16/2012	SP	30.6	434	8.23	28.03	15.32	0.05	0.012	2.08	0.30	230	0.005	324.8	0.006	662.3
SW-10	5/16/2012	SP	32.2	445	7.68	25.32	13.27	0.05	0.015	1.78	0.26	240	0.017	296.1	0.007	607.0
SW-100	5/4/2013	SP	31.8	77	7.95	28.16	15.03	0.07	0.053	2.86	0.35	252	0.007	282.3	0.024	668.9
SW-103	5/7/2013	SP	34.1	168	8.79	8.13	3.75	0.08	0.023	0.73	0.16	274	0.031	78.3	0.025	201.7
SW-14	5/18/2012	SP	31.7	430	8.58	21.17	11.03	0.07	0.033	0.90	0.46	408	0.015	166.3	0.015	478.3
SW-16	5/18/2012	SP	33.4	449	8.03	32.00	16.76	0.05	0.010	2.49	0.28	259	0.007	385.1	0.007	765.1
SW-20	5/19/2012	SP	34.0	459	7.94	30.57	15.76	0.05	0.004	2.22	0.45	261	0.020	347.9	0.009	724.0
SW-20	5/6/2013	SP	30.1	174	8.5	27.97	15.44	0.07	0.043	2.48	0.23	246		256.8	0.025	614.5
SW-24	5/20/2012	SP	39.2	451	8.02	27.76	12.87	0.05	0.021	1.91	0.40	235	0.007	308.2	0.007	633.8
SW-24	5/7/2013	SP	33.3	174	7.54	28.35	14.70	0.06	0.024	2.50	0.32	245	0.009	279.6	0.024	684.1
SW-29	5/21/2012	SP	34.8	473	8.33	22.25	10.96	0.05	0.010	1.26	0.27	391	0.005	225.9	0.011	520.6
SW-29	5/6/2013	SP	30.3	67	8.71	21.65	11.62	0.06		1.01	0.80	250	0.010	96.4	0.024	455.4
SW-31	5/22/2012	SP	35.9	426	8.11	35.74	18.05	0.06	0.014	2.76	0.21	287	0.007	432.7	0.006	847.1
SW-31	5/5/2013	SP	26.3	95	7.57	34.82	21.28	0.08	0.052	3.32	0.19	303	0.031	321.3	0.030	811.4
SW-34	5/23/2012	SP	31.4	474	7.33	35.32	19.44	0.05	0.025	2.70	0.22	287	0.009	416.3	0.008	829.1
SW-35	5/19/2012	SP	31.4	468	7.6	30.89	16.77	0.06	0.016	2.22	0.35	297	0.027	350.4	0.007	721.3
SW-35	5/6/2013	SP	30.5	171	8.41	29.36	16.15	0.07	0.040	2.98	0.32	237	0.019	270.4	0.026	674.0
SW-105	10/22/2013	TC	28.4	180	7.29	0.68	0.31	0.02	0.003	0.05	0.03	40		4.5		15.8
SW-50	10/15/2012	TC	30.5	348	8.03	0.52	0.22	0.01	0.002	0.05	0.04	31		5.5	0.002	11.2
SW-58	10/17/2012	TC	33.2	282	8.89	0.82	0.34	0.02	0.003	0.06	0.04	34	0.005	8.2	0.003	17.1
SW-61	10/18/2012	TC	30.5	286	8.26	0.83	0.36	0.01	0.003	0.07	0.04	34	0.003	7.8	0.003	17.2
SW-62	10/18/2012	TC	30.0	329	8.3	0.79	0.35	0.01	0.007	0.06	0.04	34	0.004	7.5	0.003	17.0
SW-64	10/19/2012	TC	30.6	289	8.2	0.71	0.31	0.02	0.005	0.06	0.04	34	0.003	6.9	0.003	15.4
TC-09	10/23/2013	TC	26.8	200	7.01	0.85	0.40	0.02	0.003	0.07	0.03	46	0.013	3.8		19.7
TC-10	10/24/2013	TC	28.6	180	7.62	2.31	1.10	0.03	0.028	0.19	0.05	53	0.022	14.5	0.023	42.8
TC-11	10/25/2013	TC	28.2	121	6.46	1.05	0.48	0.02		0.08	0.03	48		5.7		23.6
SW-13	5/17/2012	TC-May	32.6	457	6.36	31.69	16.85	0.05	0.025	2.45	0.18	249	0.004	387.5	0.008	736.6
SW-23	5/20/2012	TC-May	32.5	461	7.31	32.69	17.46	0.05	0.018	2.57	0.18	255	0.001	398.7	0.008	763.8
SW-28	5/21/2012	TC-May	32.6	496	7.24	33.58	17.95	0.05	0.008	2.62	0.16	259	0.003	409.9	0.009	781.6
SW-32	5/22/2012	TC-May	32.3	415	7.37	30.89	16.48	0.05	0.018	2.63	0.17	260	0.007	412.2	0.008	782.8
SW-36	5/23/2012	TC-May	32.3	448	7.2	33.62	18.09	0.05	0.016	2.66	0.17	262	0.000	413.4	0.007	790.2
SW-56	5/7/2013	TC-May	30.3	179	7.4	30.94	17.18	0.07	0.002	2.84	0.18	232		299.3	0.025	685.3
TC-01	5/4/2013	TC-May	31.0	213	7.64	30.23	16.51	0.06	0.034	3.05	0.17	230	0.008	304.3	0.022	840.2
TC-02	5/5/2013	TC-May	28.9	217	7.85	9.15	4.71	0.05	0.056	2.60	0.30	198	0.007	245.0	0.021	663.1
TC-03	5/5/2013	TC-May	30.1	209	7.56	32.27	18.07	0.06	0.022	3.68	0.16	247		331.9	0.021	922.3
TC-04	5/5/2013	TC-May	30.9	124	7.55	30.42	16.66		0.003	3.18	0.20	318	0.080	298.1	0.662	837.2
TC-05	5/5/2013	TC-May	31.0	168	7.44	31.45	17.25	0.07	0.030	3.57	0.17	245	0.009	319.5	0.027	887.0
TC-06	5/10/2013	TC-May	31.6	183	7.47	30.77	16.64	0.07	0.021	3.03	0.16	240		317.3	0.030	886.3
TC-07	5/10/2013	TC-May	33.1	220	7.45	24.87	12.79	0.10	0.008	2.58	0.31	229	0.075	274.4	0.022	759.1
TC-08	5/4/2013	TC-May	31.6	115	8.29	10.76	5.31	0.05	0.027	0.88	0.29	162	0.014	92.3	0.013	233.3

Loc	Date	Mn	Mo	Na	P	S	Si	Sr	F	Cl	Br	NO₃ ⁻	HCO₃ ⁻	DIC	DOC	CIB (%)
Blank 1	10/19/2012			1		0.1				1		0.169	2.4	0.5	2.1
Blank 2	10/18/2012			0.3						0.4					4.9
Blank 3	5/13/2012			1		0.7			0.316	1			1.1	0.213	4.9
Blank 4	5/13/2012	0.01		14	0.007		1.6	0.0085	1.97	10			0.4	0.07	4.5
SW-06	5/14/2012	0.025	0.004	265	0.01	51.0	3.6	0.31	2.8	392	0.7				13.1
SW-06	10/15/2012	0.011	0.001	190	0.01	37.8	3.3	0.22	0.1	283	1.5		101	20.0	3.2	4
SW-06	10/24/2013	0.002		154		18.1	2.3	0.16		233	0.5	1.2	115	22.7	8.8	4
SW-07	10/15/2012	0.035	0.002	892	0.19	55.8		0.56		1375			155	30.6	12.2	6
SW-08	5/16/2012	0.008	0.003	248	0.02	82.6	4.2	0.34	2.9	332					12.5
SW-08	10/15/2012	0.001	0.002	195		66.2	3.6	0.27	0.1	296	1.4	0.2	123	24.2	10.6	1
SW-101	5/7/2013	0.144	0.006	2087	0.03	458.8	3.0	1.95	0.6	3297	12.7		190	37.4	24.7	1
SW-11	5/17/2012	0.141	0.005	163	0.16	30.3	4.2	0.27	2.2	220					13.0
SW-12	5/17/2012	0.021	0.006	93	0.08	58.6	6.5	0.21	3.0	123					22.7
SW-12	10/16/2012	0.050	0.002	290	0.02	93.5	5.5	0.31	0.1	377	1.6		127	25.0	5.7	10
SW-17	5/18/2012	0.168	0.006	380	0.10	67.0	5.5	0.30	2.6	506	1.4				12.6
SW-17	10/16/2012	0.002	0.003	344	0.27	63.9	2.6	0.30		449			148	29.2	10.9	7
SW-17	5/7/2013	0.004		495	0.08	62.4	4.3	0.34	0.6	763	7.5		200	39.4	14.4	−1
SW-17	10/25/2013	0.013		286		43.7	3.1	0.21		419	0.6		166	32.7	11.5	0
SW-18	5/18/2012	0.073	0.002	369	0.04	45.6	5.4	0.34	3.5	551					14.4
SW-18	10/16/2012	0.008	0.002	291	0.01	33.1	2.9	0.29	0.0	435	1.9		162	31.8	12.2	5
SW-18	5/7/2013	0.187	0.003	410	0.06	42.2	4.1	0.38	0.5	670	7.4		140	27.6	9.7	2
SW-18	10/25/2013			192		15.7	3.1	0.19		286	0.5		152	29.9	8.6	5
SW-19	5/19/2012	0.835	0.002	284	1.47	19.5	18.3	0.32	3.3	385					24.6
SW-19	10/16/2012	0.120	0.001	251	0.92	14.6	16.7	0.24		371	1.7		226	44.5	8.9	7
SW-19	5/6/2013	0.358	0.003	429	0.40	37.1	6.8	0.43	0.4	693	7.4		220	43.3	20.0	6
SW-19	10/23/2013	0.190		319	0.52	15.7	12.9	0.30		493	0.6	0.7	180	35.4	10.1	1
SW-21	5/20/2012	0.044	0.005	230	0.06	57.6	4.5	0.28	2.3	305					10.1
SW-21	10/17/2012	0.038	0.002	173	0.02	46.1	3.3	0.21	0.1	256	1.4	0.2	151	29.7	6.7	−1
SW-22	5/20/2012	0.112	0.003	229	0.01	57.3	4.2	0.28	1.8	302					12.9
SW-22	10/26/2013	0.035		158		28.3	1.8	0.18		232	0.5	0.7	121	23.8	8.0	4
SW-25	5/20/2012	0.025	0.002	876	0.02	75.2	4.1	0.64	4.3	1279	3.8				12.5
SW-25	10/17/2012	0.003	0.001	316	0.01	23.9	2.9	0.24	0.1	485	2.0		102	20.2	7.8	5
SW-25	5/7/2013	0.245		745	0.02	41.7	4.4	0.48	0.5	1152	8.4		143	28.2	12.9	4
SW-27	5/21/2012	0.002	0.003	552	0.03	34.3	2.3	0.34	3.8	810					9.3
SW-27	10/19/2012	0.019	0.001	317	0.02	23.0	1.9	0.21	0.2	498	2.0		113	22.2	9.0	3
SW-27	5/5/2013	0.150	0.005	534	0.01	24.8	3.3	0.30	0.7	806	7.7	2.0	171	33.6	11.5	3
SW-27	10/26/2013	0.072		196		13.1	2.1	0.11		300	0.5		85	16.7	9.5	3
SW-30	5/22/2012	0.005	0.005	356	0.02	38.5	3.1	0.24	3.9	484					20.0
SW-30	10/19/2012	0.017	0.003	219	0.01	44.0	3.2	0.22	0.1	330	1.6		143	28.1	6.4	1
SW-30	5/8/2013	0.017	0.009	387	0.02	62.2	2.3	0.35	0.6	578	7.2		206	40.6	15.0	0
SW-33	5/23/2012	0.452	0.006	2090	0.12	173.1	5.6	1.11	9.5	2840					34.2
SW-33	10/18/2012	0.006	0.002	400	0.07	71.6		0.36		602			142	27.9	7.2	3
SW-33	5/5/2013	0.443	0.006	1287	0.11	139.5	4.2	1.00	0.7	2123	10.7		329	64.8	18.3	0
SW-33	10/27/2013	0.013		296		30.2	3.2	0.25		434	0.6	0.6	141	27.9	9.0	5
SW-52	10/15/2012	0.001	0.002	195	0.08	53.3	5.3	0.23	0.1	298	1.4		112	22.1	3.9	3
SW-52	10/24/2013	0.001	0.002	162	0.00	44.9	4.2	0.21		249	0.5		128	25.1	8.7	6
SW-63	10/19/2012	0.008	0.002	368	0.22	25.5	3.6	0.21	0.2	500	2.0	0.4	106	20.8	6.2	8
SW-70	10/27/2013	0.117		123		34.6	0.1	0.16		188	0.5	0.6	96	18.9	7.8	3
SW-09	10/15/2012	0.249	0.006	659		39.8		0.49		922			273	53.8	12.5	7
SW-14	10/25/2013	0.006		461		62.6		0.00		661	0.6	0.2	262	51.5	11.8	−14
SW-16	10/16/2012	0.005	0.001	84	0.01	11.5	3.9	0.19	0.1	119	1.0		118	23.2	4.6	6
SW-20	10/16/2012	0.138	0.001	259	0.02	21.9	2.5	0.37	0.1	400	1.8	0.2	104	20.4	5.6	11
SW-20	10/23/2013	0.063		111		6.1	3.2	0.21		168	0.5		219	43.0	8.0	2
SW-24	10/17/2012	0.024	0.001	229	0.02	14.6	2.6	0.24	0.1	353	1.7	0.2	126	24.8	5.1	6
SW-31	10/18/2012	0.009	0.002	325	0.01	33.9	2.5	0.32	0.1	504	2.1	0.2	125	24.7	7.1	4
SW-31	10/27/2013	0.029		267		20.2	2.8	0.20		395	0.6	0.6	97	19.1	7.3	5
SW-34	10/18/2012	0.022	0.001	387	0.01	26.9	0.3	0.36		523			154	30.3	8.0	11
SW-35	10/16/2012	0.045	0.001	208	0.01	13.6	1.5	0.20	0.1	313	1.6	0.3	98	19.4	4.7	7
SW-35	10/23/2013	0.136		217		8.0	2.5	0.33		324	0.6		266	52.4	9.9	3
SW-51	10/15/2012	0.003	0.001	255	0.01	66.2	0.7	0.30	0.1	358	1.6	0.2	126	24.7	5.7	2
SW-53	10/15/2012	0.015	0.001	110	0.03	11.9	4.2	0.16	0.1	163	1.1	0.3	109	21.5	3.8	6
SW-53	10/25/2013	0.093		215		18.2	2.6	0.25		332	0.6		176	34.7	9.3	4
SW-55	10/17/2012	0.260	0.006	299	0.04	55.2	0.5	0.35	0.1	432	1.8		111	21.9	4.7	7
SW-59	10/17/2012	0.005	0.002	700	0.04	144.0		0.67		905			109	21.4	7.0	10
SW-60	10/17/2012	0.006	0.002	711	0.03	142.4		0.66		1087			116	22.8	6.5	3
SW-65	10/19/2012	0.072	0.001	204	0.03	22.3	3.5	0.24	0.1	313	1.5		140	27.6	6.4	4
RW-02	10/26/2013			2		0.3				2		0.2			1.8	19
RW-03	10/26/2013			1		0.2				2			3	0.6	1.0	−13
RW-04	10/27/2013			3		0.9	2.9	0.02		4		0.1	35	6.9	1.7	−2
SW-07	5/16/2012	0.002	0.007	9917	0.02	729.3	1.2	4.36	27.6	13,678	14.6				19.2
SW-09	5/16/2012	0.002	0.004	8642	0.03	565.1	0.4	3.27	23.3	12,105	13.8				20.6
SW-10	5/16/2012	0.607	0.006	7559	0.15	557.5	4.5	3.61	22.5	10,686	21.1				23.6
SW-100	5/4/2013	0.011	0.007	7471	0.07	603.7	2.7	4.75	0.8	11,415	37.9		188	37.0	6.9	5
SW-103	5/7/2013	0.006	0.005	1737	0.02	489.0	1.3	1.87	0.7	2587	10.2	1.5	101	19.8	15.8	1
SW-14	5/18/2012	0.775	0.009	6395	0.03	507.0	2.4	3.45	20.0	8718	15.7				45.9
SW-16	5/18/2012	0.006	0.010	10,137	0.04	665.0	2.1	4.13	29.4	14,085	15.7				21.1
SW-20	5/19/2012	0.044	0.008	9724	0.06	607.4	1.7	3.74	27.5	13,247	25.3				34.0
SW-20	5/6/2013	0.040	0.006	6406	0.07	555.0	0.0	4.33	0.8	10,475	34.9		157	31.0	7.6	2
SW-24	5/20/2012	0.038	0.003	8565	0.02	522.1	2.2	3.47	25.0	11,926	21.1				19.2
SW-24	5/7/2013	0.351	0.004	7419	0.07	588.9	3.1	4.69	0.8	11,537	38.2		203	40.0	8.0	4
SW-29	5/21/2012	0.044	0.006	6705	0.05	668.3	0.7	3.36	20.4	9027	20.2				43.1
SW-29	5/6/2013	0.011		5439	0.22	77.5	1.3	3.69	0.4	8429	29.3		135	26.7	22.4	8
SW-31	5/22/2012	0.022	0.005	11,760	0.01	749.8	0.9	4.92	33.0	16,032	32.9				18.1
SW-31	5/5/2013	0.229	0.004	8224		759.7	1.0	5.62	0.8	12,705	42.0	1.8	107	21.1	9.1	5
SW-34	5/23/2012	0.297	0.013	10,886	0.03	731.1	1.4	4.82	30.3	15,677	32.6				14.0
SW-35	5/19/2012	0.734	0.009	9736	0.07	626.9	2.1	4.29	27.5	13,526	23.8				33.9
SW-35	5/6/2013	0.010	0.004	7266	0.10	559.3	1.4	4.22	0.7	11,182	37.1		178	35.1	10.1	5
SW-105	10/22/2013	0.125		73		6.7	4.0	0.16		112	0.5		161	31.7	8.8	3
SW-50	10/15/2012	0.001	0.001	57	0.08	7.3	4.3	0.13	0.1	86	0.9	0.5	138	27.1	8.0	−1
SW-58	10/17/2012	0.002	0.001	123	0.05	12.7	4.0	0.17	0.1	182	1.2		107	21.2	7.9	6
SW-61	10/18/2012	0.001	0.001	120	0.04	11.8	4.3	0.17	0.1	179	1.2	0.5	113	22.3	3.1	5
SW-62	10/18/2012	0.001	0.001	112	0.05	11.4	4.4	0.17	0.1	166	1.1	0.6	114	22.5	4.5	6
SW-64	10/19/2012	0.000	0.001	108	0.06	10.4	4.3	0.16	0.1	143	1.1		115	22.7	4.9	8
TC-09	10/23/2013	0.146		95		3.9	4.0	0.19		143	0.5		226	44.6	9.0	1
TC-10	10/24/2013	0.008	0.001	373	0.06	41.2	1.2	0.34		543	0.6	0.2	183	36.0	8.5	4
TC-11	10/25/2013	0.008		127		18.6	3.0	0.21		195	0.5		174	34.3	8.6	2
SW-13	5/17/2012	0.002	0.009	9965	0.07	666.4	1.7	4.30	26.6	13,879	25.3				9.6
SW-23	5/20/2012	0.002	0.009	10,347	0.05	684.4	1.7	4.49	28.6	14,309	15.5				8.2
SW-28	5/21/2012	0.001	0.007	10,384	0.05	703.0	1.6	4.57	28.8	14,765	29.0				11.6
SW-32	5/22/2012	0.005	0.012	10,358	0.04	705.1	1.7	4.57	30.8	14,904	27.0				10.9
SW-36	5/23/2012	0.001	0.007	10,670	0.06	711.2	1.7	4.61	29.9	14,811	29.9				9.3
SW-56	5/7/2013	0.002	0.008	7843	0.05	620.9	1.7	4.87	0.8	11,763	39.1		171	33.6	4.7	5
TC-01	5/4/2013	0.001	0.007	7400	0.04	653.7	1.5	4.98	0.9	11,909	39.7		150	29.5	5.6	4
TC-02	5/5/2013		0.006	5765	0.07	516.7	1.9	3.96	0.8	9219	31.0	1.5	160	31.5	5.4	4
TC-03	5/5/2013		0.005	7739	0.21	714.1	1.5	5.41	0.9	12,552	41.7		158	31.1	4.2	4
TC-04	5/5/2013	0.007	0.030	7492	0.36	674.6		5.66	0.8	11,899	39.6		171	33.6	4.6	5
TC-05	5/5/2013	0.001	0.006	7551		697.9	1.7	5.31	0.9	12,154	40.4		165	32.4	4.3	4
TC-06	5/10/2013	0.001	0.006	7423	0.06	693.1	1.5	5.19	0.9	12,120	40.3		159	31.3	4.7	3
TC-07	5/10/2013	0.211	0.006	6368	0.08	596.4	2.2	4.53	0.8	10,561	35.2		160	31.5	6.1	3
TC-08	5/4/2013	0.003	0.005	2473	0.11	251.0	2.8	1.77	0.7	3926	15.4		224	44.2	13.4	3

All concentrations in mg/L. Missing values correspond to concentrations below detection. Detection limits reported in [12]. DIC not measured for May 2012 samples, so charge imbalance error (CIB) not calculated
Salinity calculated from specific conductivity (SpC) using calculator at http://www.chemiasoft.com/chemd/salinity_calculator, after Standard Methods for the Examination of Water and Wastewater, 20th edition, 1999
Specific conductivity values that exceed the Bangladesh Government guideline of 2 mS/cm and arsenic concentrations that exceed the World Health Organization guideline of 0.01 mg/L are italicized
Water types: FP freshwater pond, RP rice paddy, SP shrimp pond, TC-Oct. tidal channel October, RW rainwater

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