Manganese Contamination

Manganese in New Jersey Drinking Water

Ranked by max manganese detected (µg/L) · UCMR 4 data (2018–2020) · Data from EPA SDWIS & UCMR

304

Cities Tested

Over SMCL

30%

% Over SMCL

58.9 µg/L

State Avg

▲ 12% vs national

vs National

331

Health Violations

Analysis

Manganese in New Jersey: what the data shows

New Jersey has 304 cities with manganese data from the EPA's UCMR 4 program (2018–2020). Manganese exceeded the 50 µg/L EPA secondary MCL in 91 of those cities. The state average max detected level is 58.9 µg/L. Manganese occurs naturally in groundwater and surface water. Elevated levels are common in areas with iron-rich geology and in systems that draw from reservoirs with low dissolved oxygen. The secondary MCL of 50 µg/L is based on aesthetic concerns (taste, staining), but health-based guidelines suggest neurological effects at higher concentrations. Emerging research links chronic manganese exposure in drinking water to neurodevelopmental effects in children, including reduced IQ and behavioral issues. Oxidation filtration and water softeners are effective at removing manganese from household water.

Comparison

Cities exceeding 50 µg/L EPA Secondary MCL

New Jersey

30%

91 of 304 cities

→ ▲ 12% above national rate (worse)

National avg

18%

729 of 4068 cities

City Map

Manganese data across New Jersey

Each dot is a city with UCMR 4 manganese testing data. Cities where manganese exceeds the 50 µg/L EPA secondary MCL are highlighted. Size reflects population served.

Worst Offenders

Top 10 cities by manganese level in New Jersey

Highest Manganese levels (µg/L)

All Cities

All New Jersey cities ranked by manganese level

#	City	Level	Over SMCL?	Violations	Grade
1	Absecon City-0101	690.0 µg/L	Over SMCL	9	C-
2	Absecon City-0101	690.0 µg/L	Over SMCL	22	F
3	Absecon City-0101	690.0 µg/L	Over SMCL	4	B-
4	Absecon City-0101	690.0 µg/L	Over SMCL	0	A-
5	Absecon City-0101	690.0 µg/L	Over SMCL	0	A-
6	Absecon City-0101	690.0 µg/L	Over SMCL	0	A-
7	Absecon City-0101	690.0 µg/L	Over SMCL	0	A-
8	South River Boro-1223	351.0 µg/L	Over SMCL	7	F
9	East Newark Boro-0902	330.8 µg/L	Over SMCL	2	B+
10	Glassboro Boro-0806	268.0 µg/L	Over SMCL	16	C
11	Montville Twp.-1421	236.2 µg/L	Over SMCL	7	C
12	Parsippany Troy-Hills-1429	162.0 µg/L	Over SMCL	5	F
13	Elizabeth City- 2004	160.0 µg/L	Over SMCL	8	C-
14	Elizabeth City- 2004	160.0 µg/L	Over SMCL	6	F
15	Manchester Twp.-1518	142.0 µg/L	Over SMCL	23	F
16	Hillside Twp.-2007	121.0 µg/L	Over SMCL	32	C
17	Hillside Twp.-2007	121.0 µg/L	Over SMCL	32	C
18	Hillside Twp.-2007	121.0 µg/L	Over SMCL	35	F
19	Hillside Twp.-2007	121.0 µg/L	Over SMCL	75	F
20	Hillside Twp.-2007	121.0 µg/L	Over SMCL	67	F
21	Hillside Twp.-2007	121.0 µg/L	Over SMCL	32	B-
22	Lawrence Twp.-1107	112.0 µg/L	Over SMCL	37	F
23	Wildwood City-0514	111.0 µg/L	Over SMCL	6	B-
24	Collingswood Boro-0412	97.2 µg/L	Over SMCL	4	B+
25	Little Falls Twp.-1605	84.0 µg/L	Over SMCL	12	B
26	Summit City-2018	84.0 µg/L	Over SMCL	5	D+
27	Summit City-2018	84.0 µg/L	Over SMCL	2	F
28	Summit City-2018	84.0 µg/L	Over SMCL	2	D+
29	Summit City-2018	84.0 µg/L	Over SMCL	42	F
30	Summit City-2018	84.0 µg/L	Over SMCL	10	C
31	Summit City-2018	84.0 µg/L	Over SMCL	1	B
32	Summit City-2018	84.0 µg/L	Over SMCL	0	C-
33	Summit City-2018	84.0 µg/L	Over SMCL	3	B-
34	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
35	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
36	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
37	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
38	Summit City-2018	84.0 µg/L	Over SMCL	12	F
39	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
40	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
41	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
42	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
43	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
44	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
45	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
46	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
47	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
48	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
49	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
50	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
51	Summit City-2018	84.0 µg/L	Over SMCL	0	B+
52	Pompton Lakes Boro-1609	83.8 µg/L	Over SMCL	0	C
53	Sparta Twp.-1918	82.3 µg/L	Over SMCL	11	F
54	Franklin Twp.-1808	77.2 µg/L	Over SMCL	16	D+
55	Franklin Twp.-1808	77.2 µg/L	Over SMCL	1	B
56	Willingboro Twp.-0338	75.0 µg/L	Over SMCL	1	B
57	Wall Twp.-1352	73.8 µg/L	Over SMCL	5	C+
58	Freehold Twp.-1316	73.0 µg/L	Over SMCL	13	B-
59	Freehold Twp.-1316	73.0 µg/L	Over SMCL	2	B
60	Freehold Twp.-1316	73.0 µg/L	Over SMCL	8	D+
61	Freehold Twp.-1316	73.0 µg/L	Over SMCL	3	B-
62	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B
63	Freehold Twp.-1316	73.0 µg/L	Over SMCL	22	F
64	Freehold Twp.-1316	73.0 µg/L	Over SMCL	4	C
65	Freehold Twp.-1316	73.0 µg/L	Over SMCL	4	C
66	Freehold Twp.-1316	73.0 µg/L	Over SMCL	4	C
67	Freehold Twp.-1316	73.0 µg/L	Over SMCL	6	F
68	Freehold Twp.-1316	73.0 µg/L	Over SMCL	3	C-
69	Freehold Twp.-1316	73.0 µg/L	Over SMCL	9	C+
70	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
71	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
72	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
73	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
74	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
75	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
76	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
77	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
78	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
79	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
80	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
81	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
82	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
83	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
84	Freehold Twp.-1316	73.0 µg/L	Over SMCL	1	B+
85	Point Pleasant Boro-1524	67.8 µg/L	Over SMCL	2	C-
86	Medford Twp.-0320	66.2 µg/L	Over SMCL	2	C+
87	Jackson Twp.-1511	59.9 µg/L	Over SMCL	18	F
88	Clinton Town -1005	52.9 µg/L	Over SMCL	2	D
89	East Hanover Twp.-1410	51.2 µg/L	Over SMCL	8	C+
90	Pequannock Twp.-1431	50.4 µg/L	Over SMCL	24	F
91	Guttenberg Town-0903	50.2 µg/L	Over SMCL	4	D+
92	Lacey Twp.-1512	48.7 µg/L	No	2	B+
93	West Caldwell Boro-0721	48.1 µg/L	No	3	C
94	Burlington Twp.-0306	47.0 µg/L	No	5	F
95	West Deptford Twp.-0820	45.5 µg/L	No	2	B
96	Washington Twp.-0818	45.0 µg/L	No	0	F
97	Monroe Twp.-0811	45.0 µg/L	No	9	C
98	Old Bridge Twp.-1209	43.4 µg/L	No	14	C+
99	Boonton Town-1401	43.3 µg/L	No	9	F
100	Winslow Twp.-0436	42.7 µg/L	No	37	F
101	Marlboro Twp.-1328	41.5 µg/L	No	13	C+
102	Old Bridge Twp.-1209	41.5 µg/L	No	8	B
103	Burlington Twp.-0306	41.1 µg/L	No	25	F
104	Burlington Twp.-0306	41.1 µg/L	No	8	C-
105	Burlington Twp.-0306	41.1 µg/L	No	8	C-
106	Camden City-0408	41.1 µg/L	No	8	C+
107	Hammonton Town-0113	40.6 µg/L	No	38	C+
108	Burlington Twp.-0306	39.7 µg/L	No	2	C+
109	Freehold Boro-1315	39.7 µg/L	No	3	B-
110	Rockaway Twp.-1435	39.6 µg/L	No	8	F
111	Vineland City-0614	39.0 µg/L	No	70	F
112	Franklin Twp.-0805	39.0 µg/L	No	19	F
113	Franklin Twp.-0805	39.0 µg/L	No	5	B+
114	Stafford Twp.-1530	38.7 µg/L	No	3	B
115	Guttenberg Town-0903	37.7 µg/L	No	4	C+
116	Guttenberg Town-0903	37.7 µg/L	No	4	D
117	Guttenberg Town-0903	37.7 µg/L	No	4	D
118	Guttenberg Town-0903	37.7 µg/L	No	4	D
119	Guttenberg Town-0903	37.7 µg/L	No	2	B-
120	Guttenberg Town-0903	37.7 µg/L	No	2	B-
121	Guttenberg Town-0903	37.7 µg/L	No	2	B-
122	Guttenberg Town-0903	37.7 µg/L	No	2	B-
123	Guttenberg Town-0903	37.7 µg/L	No	2	B-
124	Guttenberg Town-0903	37.7 µg/L	No	2	B-
125	Guttenberg Town-0903	37.7 µg/L	No	2	B-
126	Guttenberg Town-0903	37.7 µg/L	No	2	B-
127	Guttenberg Town-0903	37.7 µg/L	No	2	B-
128	Guttenberg Town-0903	37.7 µg/L	No	2	B-
129	Guttenberg Town-0903	37.7 µg/L	No	2	B-
130	Guttenberg Town-0903	37.7 µg/L	No	2	B-
131	Guttenberg Town-0903	37.7 µg/L	No	2	B-
132	Guttenberg Town-0903	37.7 µg/L	No	2	B-
133	Guttenberg Town-0903	37.7 µg/L	No	2	B-
134	Guttenberg Town-0903	37.7 µg/L	No	2	B-
135	Guttenberg Town-0903	37.7 µg/L	No	2	B-
136	Guttenberg Town-0903	37.7 µg/L	No	2	B-
137	Guttenberg Town-0903	37.7 µg/L	No	2	B-
138	Guttenberg Town-0903	37.7 µg/L	No	2	B-
139	Guttenberg Town-0903	37.7 µg/L	No	2	B-
140	Guttenberg Town-0903	37.7 µg/L	No	2	B-
141	Guttenberg Town-0903	37.7 µg/L	No	2	B-
142	Guttenberg Town-0903	37.7 µg/L	No	2	B-
143	Guttenberg Town-0903	37.7 µg/L	No	2	B-
144	Guttenberg Town-0903	37.7 µg/L	No	2	B-
145	Guttenberg Town-0903	37.7 µg/L	No	2	B-
146	Guttenberg Town-0903	37.7 µg/L	No	2	B-
147	Guttenberg Town-0903	37.7 µg/L	No	2	B-
148	Guttenberg Town-0903	37.7 µg/L	No	2	B-
149	Guttenberg Town-0903	37.7 µg/L	No	2	B-
150	Guttenberg Town-0903	37.7 µg/L	No	2	B-
151	Guttenberg Town-0903	37.7 µg/L	No	2	B-
152	Guttenberg Town-0903	37.7 µg/L	No	2	B-
153	Guttenberg Town-0903	37.7 µg/L	No	2	B-
154	Guttenberg Town-0903	37.7 µg/L	No	2	B-
155	Guttenberg Town-0903	37.7 µg/L	No	2	B-
156	Guttenberg Town-0903	37.7 µg/L	No	2	B-
157	Guttenberg Town-0903	37.7 µg/L	No	2	B-
158	Guttenberg Town-0903	37.7 µg/L	No	2	B-
159	Guttenberg Town-0903	37.7 µg/L	No	2	B-
160	Guttenberg Town-0903	37.7 µg/L	No	2	B-
161	Guttenberg Town-0903	37.7 µg/L	No	2	B-
162	Guttenberg Town-0903	37.7 µg/L	No	2	B-
163	Guttenberg Town-0903	37.7 µg/L	No	2	B-
164	Guttenberg Town-0903	37.7 µg/L	No	2	B-
165	Guttenberg Town-0903	37.7 µg/L	No	2	B-
166	Guttenberg Town-0903	37.7 µg/L	No	2	B-
167	Guttenberg Town-0903	37.7 µg/L	No	2	B-
168	Guttenberg Town-0903	37.7 µg/L	No	2	B-
169	Guttenberg Town-0903	37.7 µg/L	No	2	B-
170	Orange City-0717	37.7 µg/L	No	5	C+
171	Pennsville Twp.-1708	37.4 µg/L	No	5	C-
172	Gloucester City-0414	36.0 µg/L	No	2	A-
173	Burlington Twp.-0306	35.5 µg/L	No	1	B-
174	Belmar Boro-1306	35.4 µg/L	No	3	B-
175	Ringwood Boro-1611	34.9 µg/L	No	19	F
176	Ringwood Boro-1611	34.9 µg/L	No	10	D
177	Jefferson Twp.-1414	34.6 µg/L	No	36	F
178	Montclair Town-0713	34.4 µg/L	No	1	B
179	Cape May City-0502	34.1 µg/L	No	9	B
180	Millville City-0610	33.9 µg/L	No	3	F
181	Brooklawn Boro-0407	32.2 µg/L	No	0	B
182	North Brunswick Twp.-1215	31.0 µg/L	No	17	F
183	Woodbridge Twp.-1225	29.0 µg/L	No	1	B
184	Hamilton Twp-0112	28.8 µg/L	No	4	C
185	Hamilton Twp-0112	28.8 µg/L	No	4	C+
186	Woodbury City-0822	28.3 µg/L	No	0	B
187	Bordentown Twp.-0304	27.0 µg/L	No	17	C
188	Bordentown Twp.-0304	27.0 µg/L	No	14	B-
189	Bordentown Twp.-0304	27.0 µg/L	No	14	B-
190	Ridgewood Twp-0251	26.1 µg/L	No	12	D+
191	Evesham Twp.-0313	25.5 µg/L	No	1	A-
192	Saddle Brook Twp-0257	23.8 µg/L	No	13	B-
193	Elmwood Park Boro-0211	23.4 µg/L	No	12	B-
194	Pemberton Twp.-0329	22.3 µg/L	No	21	D
195	Ship Bottom Boro-1528	22.1 µg/L	No	2	A-
196	Bridgeton City-0601	21.5 µg/L	No	55	D
197	Fair Lawn Boro-0217	20.9 µg/L	No	8	F
198	Haledon Boro-1603	20.9 µg/L	No	22	C+
199	Berkeley Twp.-1505	20.5 µg/L	No	2	C+
200	Deptford Twp.-0802	20.4 µg/L	No	3	B-
201	Burlington Twp.-0306	20.0 µg/L	No	1	B-
202	Burlington Twp.-0306	20.0 µg/L	No	0	B-
203	Burlington Twp.-0306	20.0 µg/L	No	0	C+
204	Burlington Twp.-0306	20.0 µg/L	No	1	B-
205	Burlington Twp.-0306	20.0 µg/L	No	0	C+
206	Burlington Twp.-0306	20.0 µg/L	No	0	B
207	Burlington Twp.-0306	20.0 µg/L	No	0	B
208	Burlington Twp.-0306	20.0 µg/L	No	0	B
209	Burlington Twp.-0306	20.0 µg/L	No	0	B
210	Burlington Twp.-0306	20.0 µg/L	No	0	B
211	Burlington Twp.-0306	20.0 µg/L	No	0	B
212	Burlington Twp.-0306	20.0 µg/L	No	0	B
213	Burlington Twp.-0306	20.0 µg/L	No	0	B
214	Burlington Twp.-0306	20.0 µg/L	No	0	B
215	Burlington Twp.-0306	20.0 µg/L	No	0	B
216	Burlington Twp.-0306	20.0 µg/L	No	0	B
217	Burlington Twp.-0306	20.0 µg/L	No	0	B
218	Burlington Twp.-0306	20.0 µg/L	No	0	B
219	Burlington Twp.-0306	20.0 µg/L	No	0	B
220	Burlington Twp.-0306	20.0 µg/L	No	0	B
221	Burlington Twp.-0306	20.0 µg/L	No	0	B
222	Burlington Twp.-0306	20.0 µg/L	No	0	B
223	Burlington Twp.-0306	20.0 µg/L	No	0	B
224	Burlington Twp.-0306	20.0 µg/L	No	0	B
225	Burlington Twp.-0306	20.0 µg/L	No	0	B
226	Burlington Twp.-0306	20.0 µg/L	No	0	B
227	Burlington Twp.-0306	20.0 µg/L	No	0	B
228	Burlington Twp.-0306	20.0 µg/L	No	0	B
229	Burlington Twp.-0306	20.0 µg/L	No	0	B
230	Burlington Twp.-0306	20.0 µg/L	No	0	B
231	Randolph Twp.-1432	18.6 µg/L	No	3	B+
232	Brigantine City-0103	18.1 µg/L	No	3	B+
233	Spring Lake Boro-1348	18.1 µg/L	No	0	A-
234	East Windsor Twp.-1101	17.7 µg/L	No	1	A-
235	Freehold Twp.-1316	17.3 µg/L	No	17	D+
236	Longport Boro-0115	17.1 µg/L	No	3	A
237	Pequannock Twp.-1431	16.9 µg/L	No	10	C
238	Margate City-0116	16.7 µg/L	No	1	A
239	Barnegat Twp.-1533	15.9 µg/L	No	5	C+
240	Little Egg Harbor-1516	14.6 µg/L	No	1	A
241	Denville Twp.-1408	14.5 µg/L	No	4	F
242	Pine Beach Boro-1522	13.9 µg/L	No	0	A
243	Garfield City-0221	13.1 µg/L	No	13	B
244	Mahwah Twp-0233	12.2 µg/L	No	2	C-
245	Kearny Town-0907	11.2 µg/L	No	2	B+
246	Lyndhurst Twp-0232	11.2 µg/L	No	2	B+
247	Hillsdale Boro-0227	10.9 µg/L	No	2	C+
248	Hillsdale Boro-0227	10.9 µg/L	No	2	C+
249	New Brunswick City-1214	10.8 µg/L	No	46	D+
250	Ventnor City-0122	10.0 µg/L	No	7	B+
251	Oldmans Twp.-1706	9.9 µg/L	No	3	B-
252	Oldmans Twp.-1706	9.9 µg/L	No	3	B-
253	Oldmans Twp.-1706	9.9 µg/L	No	1	B+
254	Bayonne City-0901	9.5 µg/L	No	1	B+
255	Beach Haven Boro-1503	9.2 µg/L	No	1	A-
256	Edison Twp.-1205	9.1 µg/L	No	4	B-
257	Pine Hill Boro-0428	8.9 µg/L	No	0	A-
258	Phillipsburg Town-2119	8.8 µg/L	No	0	B+
259	Atlantic City-0102	8.6 µg/L	No	4	B
260	Berlin Boro-0405	8.6 µg/L	No	1	B+
261	Franklin Boro-1906	8.4 µg/L	No	6	B-
262	Totowa Boro-1612	7.9 µg/L	No	1	B-
263	Ocean City-0508	7.8 µg/L	No	0	A+
264	Rahway City-2013	7.2 µg/L	No	12	B
265	New Hanover Twp.-0325	7.2 µg/L	No	4	B+
266	Nutley Town-0716	6.8 µg/L	No	13	C
267	Cedar Grove Twp.-0704	6.7 µg/L	No	3	B
268	Manalapan Twp.-1326	6.5 µg/L	No	1	B+
269	Harrison Twp.-0808	6.4 µg/L	No	0	A-
270	Madison Boro-1417	6.1 µg/L	No	7	B-
271	Mendham Twp.-1419	6.0 µg/L	No	2	D+
272	Mendham Twp.-1419	6.0 µg/L	No	2	C-
273	Mendham Twp.-1419	6.0 µg/L	No	2	C-
274	Mendham Twp.-1419	6.0 µg/L	No	2	C-
275	Long Beach Twp.-1517	5.2 µg/L	No	0	F
276	North Arlington Boro-0239	4.9 µg/L	No	7	B+
277	Lawrence Twp.-1107	4.3 µg/L	No	40	F
278	Lawrence Twp.-1107	4.3 µg/L	No	39	F
279	Lawrence Twp.-1107	4.3 µg/L	No	35	D
280	Lawrence Twp.-1107	4.3 µg/L	No	35	D
281	Roxbury Twp.-1436	4.3 µg/L	No	8	D+
282	Mantua Twp.-0810	4.3 µg/L	No	28	F
283	Avalon Boro-0501	3.9 µg/L	No	2	B
284	Stone Harbor Boro-0510	3.9 µg/L	No	2	B+
285	Washington Boro-2121	3.7 µg/L	No	0	B+
286	Paulsboro Boro-0814	3.7 µg/L	No	6	B+
287	Seaside Park Boro-1527	3.3 µg/L	No	1	A-
288	Harrison Town-0904	3.3 µg/L	No	3	B+
289	Buena Boro-0104	3.2 µg/L	No	1	A
290	Oakland Boro-0242	2.9 µg/L	No	2	B-
291	Sea Isle City-0509	2.6 µg/L	No	0	A-
292	Barnegat Twp.-1533	2.5 µg/L	No	2	B+
293	Hoboken City-0905	2.4 µg/L	No	0	A-
294	Verona Boro-0720	2.3 µg/L	No	5	F
295	Jersey City-0906	2.2 µg/L	No	5	B
296	Mount Holly Twp.-0323	2.1 µg/L	No	0	B+
297	Ramsey Boro-0248	1.9 µg/L	No	56	F
298	Perth Amboy City--1216	1.9 µg/L	No	8	C+
299	Seaside Heights Boro-1526	1.7 µg/L	No	0	A-
300	Wayne Twp.-1614	1.0 µg/L	No	1	B+
301	Beachwood Boro-1504	0.9 µg/L	No	0	B-
302	Wall Twp.-1352	0.7 µg/L	No	1	B
303	Highland Park Boro-1207	0.7 µg/L	No	4	B+
304	East Brunswick Twp.-1204	0.6 µg/L	No	17	F

FAQ

Frequently asked questions about manganese in New Jersey

Is manganese in New Jersey tap water harmful?

The EPA secondary MCL for manganese is 50 µg/L, set primarily for aesthetic reasons (taste, color, staining). 91 cities in New Jersey exceed the secondary MCL. However, emerging research links chronic manganese exposure above 50–100 µg/L to neurodevelopmental effects in children, including reduced IQ.

How can I remove manganese from my drinking water?

Oxidation filtration (such as greensand or birm filters) is the most common and effective method for removing manganese from well water. Water softeners using ion exchange also work well. Standard carbon filters provide limited manganese removal. If your water has a metallic taste or brown/black discoloration, manganese may be the cause.

What causes high manganese in New Jersey water?

Manganese occurs naturally in groundwater and surface water, particularly in areas with iron-rich geology. Low dissolved oxygen conditions (common in deep wells and reservoir bottom waters) increase manganese solubility. Industrial sources include mining, steel production, and battery manufacturing. Seasonal changes in reservoir water chemistry can cause manganese spikes.

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