Table 2.

Summary of pH and major ions (μeq L⁻¹) in rainwater for weekly/event-based samples collected from different study sites. Listed are the volume-weighted mean concentrations (VMC), in addition to the arithmetic mean, standard deviation, minimum, maximum, and median concentrations.

	pH	Ca²⁺	Mg²⁺	K⁺	Na⁺	${NH}_{4}^{+}$	${NO}_{3}^{-}$	Cl⁻	${SO}_{4}^{2 -}$
HI00
VMC	4.99	1.15	0.80	0.17	2.19	1.46	1.10	2.14	12.35
Mean ± std dev	5.42 ± 0.74	5.10 ± 9.34	3.39 ± 7.84	0.75 ± 2.84	13.96 ± 67.99	3.23 ± 5.97	2.43 ± 3.02	7.47 ± 13.16	25.86 ± 49.34
Min/Max	2.39/7.24	0.50/75.00	0.25/85.67	0.05/38.92	0.13/820.87	0.56/47.22	0.32/20.81	0.56/132.39	0.83/610.42
Median	5.44	2.00	1.08	0.13	3.61	1.11	1.29	3.38	13.13
BTT
VMC	4.94	12.73	53.67	5.22	239.14	3.57	5.38	277.38	34.45
Mean ± std dev	4.92 ± 0.38	17.36 ± 43.72	69.20 ± 179.08	6.61 ± 18.56	305.11 ± 879.47	4.62 ± 5.93	8.34 ± 9.39	358.71 ± 1041.25	47.35 ± 106.76
Min/Max	3.23\1.09	0.10/823.35	1.73/3640.48	0.08/332.48	6.09/16670.29	0.11/50.34	0.11/76.42	8.35/19891.06	1.31/942.33
Median	4.93	7.14	26.86	2.66	116.75	2.68	5.31	136.84	23.69
MM
VMC	4.95	33.81	13.06	17.60	21.79	124.91	24.95	25.82	46.74
Mean ± std dev	6.30 ± 0.85	57.66 ± 99.11	23.19 ± 45.78	43.68 ± 144.26	40.31 ± 116.95	253.26 ± 879.40	33.99 ± 59.03	48.75 ± 145.90	71.71 ± 117.60
Min/Max	2.99/8.57	1.50/877.69	0.41/309.42	0.26/1537.54	3.35/1739.89	0.61/11006.10	0.27/520.92	3.78/2126.94	9.24/1088.90
Median	6.35	28.94	9.34	7.42	19.53	52.99	19.92	22.06	42.06
WA14
VMC	5.36	1.92	5.57	0.69	25.05	2.23	1.42	29.31	5.16
Mean ± std dev	5.30 ± 0.19	2.25 ± 3.39	4.48 ± 6.73	0.72 ± 0.84	19.53 ± 29.79	3.34 ± 13.99	2.85 ± 6.90	24.96 ± 50.83	6.50 ± 7.65
Min/Max	4.59/6.48	0.20/53.80	0.08/54.17	0.05/7.13	0.13/247.00	0.22/234.78	0.15/111.05	0.39/694.37	0.38/91.38
Median	5.34	1.65	2.25	0.46	9.59	0.94	1.58	11.32	5.13
CA45
VMC	5.40	1.59	2.88	0.51	12.85	2.88	2.61	15.03	3.71
Mean ± std dev	5.39 ± 0.21	3.16 ± 6.45	2.81 ± 2.79	0.64 ± 0.80	11.11 ± 11.16	6.92 ± 18.31	6.17 ± 13.48	13.06 ± 13.06	5.79 ± 8.32
Min/Max	4.86/6.47	0.15/65.20	0.08/17.42	0.05/9.00	0.04/70.91	0.33/214.83	0.74/125.47	0.25/80.56	0.29/83.06
Median	5.39	1.85	2.00	0.41	7.17	2.50	2.79	8.28	4.04
CA42
VMC	5.32	3.68	3.97	0.62	16.67	11.17	10.29	18.90	7.38
Mean ± std dev	5.30 ± 0.49	10.36 ± 23.03	6.87 ± 10.75	1.18 ± 43.74	25.82 ± 43.74	27.01 ± 28.27	30.89 ± 37.08	28.12 ± 46.64	15.10 ± 17.81
Min/Max	3.90/6.89	0.45/238.75	0.08/106.33	0.13/432.70	0.1/432.70	1.28/161.22	1.98/248.97	0.31/458.17	0.88/128.60
Median	5.34	4.05	3.92	12.70	12.70	16.69	17.33	14.10	8.93
NJ00
VMC	4.93	4.93	4.96	1.55	37.49	12.88	10.98	43.73	18.90
Mean ± std dev	5.00 ± 0.45	5.00 ± 0.45	6.26 ± 9.40	1.90 ± 3.71	34.03 ± 40.93	16.35 ± 16.09	15.89 ± 14.25	40.11 ± 46.96	23.51 ± 20.58
Min/Max	3.76/6.47	3.76/6.47	0.33/71.50	0.05/53.44	0.57/314.87	0.44/108.00	1.00/115.71	1.18/361.75	1.46/202.56
Median	4.99	4.99	5.00	1.08	17.22	11.61	11.77	20.85	18.19
SC05
VMC	4.88	3.61	5.47	0.81	23.19	6.02	8.22	27.46	14.69
Mean ± std dev	4.88 ± 0.29	5.62 ± 5.85	6.85 ± 7.97	0.99 ± 0.91	28.34 ± 34.60	7.17 ± 8.67	11.82 ± 8.67	33.30 ± 39.64	19.01 ± 14.34
Min/Max	4.09/5.91	0.85/70.60	0.25/79.58	0.05/7.67	0.57/333.13	0.76/61.03	0.76/61.03	0.99/409.41	3.02/129.44
Median	4.87	3.90	4.42	0.72	17.74	9.97	9.97	21.92	15.10
FL11
VMC	5.09	5.76	5.80	1.93	23.57	7.88	8.47	27.46	13.54
Mean ± std dev	5.21 ± 0.49	10.23 ± 12.84	11.59 ± 16.48	2.86 ± 4.69	48.33 ± 73.77	12.01 ± 8.37	11.94 ± 83.44	55.47 ± 83.44	20.64 ± 16.41
Min/Max	4.17/6.92	0.90/148.80	0.58/180.00	0.13/46.03	4.30/809.39	0.11/57.24	5.21/918.85	5.21/918.85	1.44/125.10
Median	5.10	6.80	6.58	1.31	25.00	10.05	24.49	29.49	16.04