WaterVerge
Alerts Cities States PFAS Tracker Guides News Maps Glossary Methodology
HAA5 Contamination

HAA5 in New Jersey Drinking Water

Ranked by average HAA5 concentration (µg/L) · UCMR 4 data (2018–2020) · Data from EPA SDWIS & UCMR

309
Cities Tested
2
Exceeds Limit
1%
% Exceeds Limit
12.0 µg/L
State Avg
▼ 0% vs national
vs National
331
Health Violations
Analysis

HAA5 in New Jersey: what the data shows

New Jersey has 309 cities with HAA5 monitoring data from the EPA's UCMR 4 program (2018–2020). Haloacetic acids (HAA5) form when chlorine-based disinfectants react with natural organic matter in water. The state average is 12.0 µg/L — better than the 15.5 µg/L national average. 2 cities exceed the EPA MCL of 60 µg/L. HAA5 is a group of five chlorinated and brominated acetic acids. Long-term exposure above the MCL is associated with increased cancer risk and adverse reproductive outcomes. The EPA classifies total HAA5 as a probable human carcinogen at elevated concentrations. Activated carbon filtration (especially granular or block carbon) is effective at reducing HAA5. Running water through a refrigerator filter or letting it sit in an open pitcher for 30 minutes also helps, as some HAA5 species are volatile. Boiling does not remove disinfection byproducts and may concentrate them.

Comparison

Cities exceeding 60 µg/L EPA MCL

New Jersey
1%
2 of 309 cities
← = Exactly at national rate
National avg
1%
23 of 4420 cities
City Map

HAA5 data across New Jersey

Each dot is a city with UCMR 4 HAA5 testing data. Cities where average HAA5 exceeded the 60 µg/L EPA MCL are highlighted. Size reflects population served.

New Jersey city water quality map
Water quality: A B C D F
1 cities mapped · hover to preview · click to explore
Worst Offenders

Top 10 cities by haa5 level in New Jersey

Highest HAA5 levels (µg/L)

  1. 1 F Hillside Twp.-2007 65.5 µg/L Yes 329K
  2. 2 B- Hillside Twp.-2007 62.5 µg/L Yes 294K
  3. 3 F Hillside Twp.-2007 56.4 µg/L 342K
  4. 4 C Nutley Town-0716 49.0 µg/L 30K
  5. 5 F Hillside Twp.-2007 47.4 µg/L 369K
  6. 6 C Hillside Twp.-2007 41.5 µg/L 512K
  7. 7 C Hillside Twp.-2007 41.5 µg/L 512K
  8. 8 F East Brunswick Twp.-1204 39.7 µg/L 55K
  9. 9 B Montclair Town-0713 38.7 µg/L 40K
  10. 10 F North Brunswick Twp.-1215 37.4 µg/L 51K
All Cities

All New Jersey cities ranked by haa5 level

# City Level Level Exceeds? Violations Grade
1 Hillside Twp.-2007 65.5 µg/L
Yes 67
F
2 Hillside Twp.-2007 62.5 µg/L
Yes 32
B-
3 Hillside Twp.-2007 56.4 µg/L
No 75
F
4 Nutley Town-0716 49.0 µg/L
No 13
C
5 Hillside Twp.-2007 47.4 µg/L
No 35
F
6 Hillside Twp.-2007 41.5 µg/L
No 32
C
7 Hillside Twp.-2007 41.5 µg/L
No 32
C
8 East Brunswick Twp.-1204 39.7 µg/L
No 17
F
9 Montclair Town-0713 38.7 µg/L
No 1
B
10 North Brunswick Twp.-1215 37.4 µg/L
No 17
F
11 Kearny Town-0907 36.4 µg/L
No 2
B+
12 Bayonne City-0901 35.0 µg/L
No 1
B+
13 New Brunswick City-1214 34.3 µg/L
No 46
D+
14 Harrison Town-0904 32.4 µg/L
No 3
B+
15 Elmwood Park Boro-0211 32.3 µg/L
No 12
B-
16 Old Bridge Twp.-1209 30.4 µg/L
No 14
C+
17 Pequannock Twp.-1431 30.2 µg/L
No 10
C
18 Pequannock Twp.-1431 29.8 µg/L
No 24
F
19 Jersey City-0906 29.4 µg/L
No 5
B
20 North Arlington Boro-0239 28.0 µg/L
No 7
B+
21 Perth Amboy City--1216 27.9 µg/L
No 8
C+
22 Hoboken City-0905 27.8 µg/L
No 0
A-
23 East Newark Boro-0902 27.6 µg/L
No 2
B+
24 South River Boro-1223 27.0 µg/L
No 7
F
25 Verona Boro-0720 26.7 µg/L
No 5
F
26 Boonton Town-1401 26.6 µg/L
No 9
F
27 Cedar Grove Twp.-0704 26.4 µg/L
No 3
B
28 Wayne Twp.-1614 25.5 µg/L
No 1
B+
29 Old Bridge Twp.-1209 25.0 µg/L
No 8
B
30 West Caldwell Boro-0721 24.9 µg/L
No 3
C
31 Marlboro Twp.-1328 24.5 µg/L
No 13
C+
32 Highland Park Boro-1207 23.8 µg/L
No 4
B+
33 Mendham Twp.-1419 23.7 µg/L
No 2
D+
34 Mendham Twp.-1419 23.7 µg/L
No 2
C-
35 Mendham Twp.-1419 23.7 µg/L
No 2
C-
36 Mendham Twp.-1419 23.7 µg/L
No 2
C-
37 Woodbridge Twp.-1225 22.1 µg/L
No 1
B
38 New Hanover Twp.-0325 21.8 µg/L
No 4
B+
39 Lyndhurst Twp-0232 21.6 µg/L
No 2
B+
40 Elizabeth City- 2004 21.6 µg/L
No 8
C-
41 Edison Twp.-1205 21.1 µg/L
No 4
B-
42 Haledon Boro-1603 21.0 µg/L
No 22
C+
43 Spring Lake Boro-1348 20.7 µg/L
No 0
A-
44 Lawrence Twp.-1107 20.6 µg/L
No 40
F
45 Lawrence Twp.-1107 20.6 µg/L
No 39
F
46 Lawrence Twp.-1107 20.6 µg/L
No 35
D
47 Lawrence Twp.-1107 20.6 µg/L
No 35
D
48 Franklin Twp.-1808 19.6 µg/L
No 1
B
49 Little Falls Twp.-1605 19.5 µg/L
No 12
B
50 Guttenberg Town-0903 17.6 µg/L
No 4
C+
51 Totowa Boro-1612 17.5 µg/L
No 1
B-
52 Freehold Twp.-1316 17.5 µg/L
No 2
B
53 Elizabeth City- 2004 17.2 µg/L
No 6
F
54 Guttenberg Town-0903 17.2 µg/L
No 4
D+
55 Summit City-2018 16.9 µg/L
No 5
D+
56 Summit City-2018 16.9 µg/L
No 2
F
57 Summit City-2018 16.9 µg/L
No 2
D+
58 Franklin Twp.-1808 16.2 µg/L
No 16
D+
59 Rahway City-2013 16.1 µg/L
No 12
B
60 Brigantine City-0103 16.0 µg/L
No 3
B+
61 Point P. Beach Boro-1525 15.5 µg/L
No 1
B
62 Guttenberg Town-0903 15.1 µg/L
No 2
B-
63 Guttenberg Town-0903 15.1 µg/L
No 2
B-
64 Guttenberg Town-0903 15.1 µg/L
No 2
B-
65 Guttenberg Town-0903 15.1 µg/L
No 2
B-
66 Guttenberg Town-0903 15.1 µg/L
No 2
B-
67 Guttenberg Town-0903 15.1 µg/L
No 2
B-
68 Guttenberg Town-0903 15.1 µg/L
No 2
B-
69 Guttenberg Town-0903 15.1 µg/L
No 2
B-
70 Guttenberg Town-0903 15.1 µg/L
No 2
B-
71 Guttenberg Town-0903 15.1 µg/L
No 2
B-
72 Guttenberg Town-0903 15.1 µg/L
No 2
B-
73 Guttenberg Town-0903 15.1 µg/L
No 2
B-
74 Guttenberg Town-0903 15.1 µg/L
No 2
B-
75 Guttenberg Town-0903 15.1 µg/L
No 2
B-
76 Guttenberg Town-0903 15.1 µg/L
No 2
B-
77 Guttenberg Town-0903 15.1 µg/L
No 2
B-
78 Guttenberg Town-0903 15.1 µg/L
No 2
B-
79 Guttenberg Town-0903 15.1 µg/L
No 2
B-
80 Guttenberg Town-0903 15.1 µg/L
No 2
B-
81 Guttenberg Town-0903 15.1 µg/L
No 2
B-
82 Guttenberg Town-0903 15.1 µg/L
No 2
B-
83 Guttenberg Town-0903 15.1 µg/L
No 2
B-
84 Guttenberg Town-0903 15.1 µg/L
No 2
B-
85 Guttenberg Town-0903 15.1 µg/L
No 2
B-
86 Guttenberg Town-0903 15.1 µg/L
No 2
B-
87 Guttenberg Town-0903 15.1 µg/L
No 2
B-
88 Guttenberg Town-0903 15.1 µg/L
No 2
B-
89 Guttenberg Town-0903 15.1 µg/L
No 2
B-
90 Guttenberg Town-0903 15.1 µg/L
No 2
B-
91 Guttenberg Town-0903 15.1 µg/L
No 2
B-
92 Guttenberg Town-0903 15.1 µg/L
No 2
B-
93 Guttenberg Town-0903 15.1 µg/L
No 2
B-
94 Guttenberg Town-0903 15.1 µg/L
No 2
B-
95 Guttenberg Town-0903 15.1 µg/L
No 2
B-
96 Guttenberg Town-0903 15.1 µg/L
No 2
B-
97 Guttenberg Town-0903 15.1 µg/L
No 2
B-
98 Guttenberg Town-0903 15.1 µg/L
No 2
B-
99 Guttenberg Town-0903 15.1 µg/L
No 2
B-
100 Guttenberg Town-0903 15.1 µg/L
No 2
B-
101 Guttenberg Town-0903 15.1 µg/L
No 2
B-
102 Guttenberg Town-0903 15.1 µg/L
No 2
B-
103 Guttenberg Town-0903 15.1 µg/L
No 2
B-
104 Guttenberg Town-0903 15.1 µg/L
No 2
B-
105 Guttenberg Town-0903 15.1 µg/L
No 2
B-
106 Guttenberg Town-0903 15.1 µg/L
No 2
B-
107 Guttenberg Town-0903 15.1 µg/L
No 2
B-
108 Guttenberg Town-0903 15.1 µg/L
No 2
B-
109 Guttenberg Town-0903 15.1 µg/L
No 2
B-
110 Guttenberg Town-0903 15.1 µg/L
No 2
B-
111 Guttenberg Town-0903 15.1 µg/L
No 2
B-
112 Guttenberg Town-0903 15.1 µg/L
No 2
B-
113 Lawrence Twp.-1107 14.7 µg/L
No 37
F
114 Sayreville Boro-1219 14.6 µg/L
No 2
B
115 Manalapan Twp.-1326 14.5 µg/L
No 1
B+
116 Summit City-2018 14.0 µg/L
No 10
C
117 Freehold Twp.-1316 13.5 µg/L
No 17
D+
118 Guttenberg Town-0903 13.3 µg/L
No 4
D
119 Guttenberg Town-0903 13.3 µg/L
No 4
D
120 Guttenberg Town-0903 13.3 µg/L
No 4
D
121 Garfield City-0221 12.7 µg/L
No 13
B
122 Freehold Twp.-1316 12.6 µg/L
No 22
F
123 Ramsey Boro-0248 12.1 µg/L
No 56
F
124 Mahwah Twp-0233 11.8 µg/L
No 2
C-
125 Fair Lawn Boro-0217 10.9 µg/L
No 8
F
126 Harrison Twp.-0808 10.9 µg/L
No 0
A-
127 Freehold Twp.-1316 10.5 µg/L
No 3
C-
128 Freehold Twp.-1316 10.5 µg/L
No 9
C+
129 Freehold Twp.-1316 10.5 µg/L
No 1
B+
130 Freehold Twp.-1316 10.5 µg/L
No 1
B+
131 Freehold Twp.-1316 10.5 µg/L
No 1
B+
132 Freehold Twp.-1316 10.5 µg/L
No 1
B+
133 Freehold Twp.-1316 10.5 µg/L
No 1
B+
134 Freehold Twp.-1316 10.5 µg/L
No 1
B+
135 Freehold Twp.-1316 10.5 µg/L
No 1
B+
136 Freehold Twp.-1316 10.5 µg/L
No 1
B+
137 Freehold Twp.-1316 10.5 µg/L
No 1
B+
138 Freehold Twp.-1316 10.5 µg/L
No 1
B+
139 Freehold Twp.-1316 10.5 µg/L
No 1
B+
140 Freehold Twp.-1316 10.5 µg/L
No 1
B+
141 Freehold Twp.-1316 10.5 µg/L
No 1
B+
142 Freehold Twp.-1316 10.5 µg/L
No 1
B+
143 Freehold Twp.-1316 10.5 µg/L
No 1
B+
144 Point Pleasant Boro-1524 10.3 µg/L
No 2
C-
145 Freehold Twp.-1316 10.3 µg/L
No 4
C
146 Freehold Twp.-1316 10.3 µg/L
No 4
C
147 Freehold Twp.-1316 10.3 µg/L
No 4
C
148 Deptford Twp.-0802 10.1 µg/L
No 3
B-
149 Freehold Twp.-1316 10.1 µg/L
No 8
D+
150 Freehold Twp.-1316 10.1 µg/L
No 3
B-
151 Summit City-2018 10.1 µg/L
No 42
F
152 Summit City-2018 10.1 µg/L
No 0
C-
153 Summit City-2018 10.1 µg/L
No 3
B-
154 Summit City-2018 10.1 µg/L
No 0
B+
155 Summit City-2018 10.1 µg/L
No 0
B+
156 Summit City-2018 10.1 µg/L
No 0
B+
157 Summit City-2018 10.1 µg/L
No 0
B+
158 Summit City-2018 10.1 µg/L
No 12
F
159 Summit City-2018 10.1 µg/L
No 0
B+
160 Summit City-2018 10.1 µg/L
No 0
B+
161 Summit City-2018 10.1 µg/L
No 0
B+
162 Summit City-2018 10.1 µg/L
No 0
B+
163 Summit City-2018 10.1 µg/L
No 0
B+
164 Summit City-2018 10.1 µg/L
No 0
B+
165 Summit City-2018 10.1 µg/L
No 0
B+
166 Summit City-2018 10.1 µg/L
No 0
B+
167 Summit City-2018 10.1 µg/L
No 0
B+
168 Summit City-2018 10.1 µg/L
No 0
B+
169 Summit City-2018 10.1 µg/L
No 0
B+
170 Summit City-2018 10.1 µg/L
No 0
B+
171 Summit City-2018 10.1 µg/L
No 0
B+
172 Wall Twp.-1352 10.0 µg/L
No 5
C+
173 Freehold Twp.-1316 9.9 µg/L
No 1
B
174 Summit City-2018 9.6 µg/L
No 1
B
175 Freehold Twp.-1316 9.3 µg/L
No 13
B-
176 Freehold Twp.-1316 9.3 µg/L
No 6
F
177 Phillipsburg Town-2119 9.2 µg/L
No 0
B+
178 Saddle Brook Twp-0257 9.1 µg/L
No 13
B-
179 Longport Boro-0115 9.1 µg/L
No 3
A
180 Ventnor City-0122 8.8 µg/L
No 7
B+
181 Atlantic City-0102 8.6 µg/L
No 4
B
182 Winslow Twp.-0436 8.0 µg/L
No 37
F
183 Brooklawn Boro-0407 7.5 µg/L
No 0
B
184 Burlington Twp.-0306 7.5 µg/L
No 1
B-
185 Burlington Twp.-0306 7.5 µg/L
No 0
B
186 Burlington Twp.-0306 7.5 µg/L
No 0
B
187 Burlington Twp.-0306 7.5 µg/L
No 0
B
188 Burlington Twp.-0306 7.5 µg/L
No 0
B
189 Burlington Twp.-0306 7.5 µg/L
No 0
B
190 Burlington Twp.-0306 7.5 µg/L
No 0
B
191 Burlington Twp.-0306 7.5 µg/L
No 0
B
192 Burlington Twp.-0306 7.5 µg/L
No 0
B
193 Burlington Twp.-0306 7.5 µg/L
No 0
B
194 Burlington Twp.-0306 7.5 µg/L
No 0
B
195 Burlington Twp.-0306 7.5 µg/L
No 0
B
196 Burlington Twp.-0306 7.5 µg/L
No 0
B
197 Burlington Twp.-0306 7.5 µg/L
No 0
B
198 Burlington Twp.-0306 7.5 µg/L
No 0
B
199 Burlington Twp.-0306 7.5 µg/L
No 0
B
200 Burlington Twp.-0306 7.5 µg/L
No 0
B
201 Burlington Twp.-0306 7.5 µg/L
No 0
B
202 Burlington Twp.-0306 7.5 µg/L
No 0
B
203 Burlington Twp.-0306 7.5 µg/L
No 0
B
204 Burlington Twp.-0306 7.5 µg/L
No 0
B
205 Burlington Twp.-0306 7.5 µg/L
No 0
B
206 Burlington Twp.-0306 7.5 µg/L
No 0
B
207 Burlington Twp.-0306 7.5 µg/L
No 0
B
208 Burlington Twp.-0306 7.5 µg/L
No 0
B
209 Burlington Twp.-0306 7.5 µg/L
No 0
B
210 Burlington Twp.-0306 7.2 µg/L
No 0
C+
211 Ocean City-0508 7.0 µg/L
No 0
A+
212 Burlington Twp.-0306 6.9 µg/L
No 2
C+
213 Burlington Twp.-0306 6.9 µg/L
No 5
F
214 Montville Twp.-1421 6.9 µg/L
No 7
C
215 Burlington Twp.-0306 6.7 µg/L
No 1
B-
216 Burlington Twp.-0306 6.6 µg/L
No 0
B-
217 Burlington Twp.-0306 6.4 µg/L
No 25
F
218 Stone Harbor Boro-0510 6.2 µg/L
No 2
B+
219 Burlington Twp.-0306 6.1 µg/L
No 1
B-
220 Burlington Twp.-0306 5.9 µg/L
No 8
C-
221 Burlington Twp.-0306 5.9 µg/L
No 8
C-
222 Avalon Boro-0501 5.9 µg/L
No 2
B
223 Glassboro Boro-0806 5.9 µg/L
No 16
C
224 Evesham Twp.-0313 5.8 µg/L
No 1
A-
225 Burlington Twp.-0306 5.8 µg/L
No 0
C+
226 Margate City-0116 5.7 µg/L
No 1
A
227 West Deptford Twp.-0820 5.7 µg/L
No 2
B
228 Ringwood Boro-1611 5.5 µg/L
No 19
F
229 Ringwood Boro-1611 5.5 µg/L
No 10
D
230 East Hanover Twp.-1410 5.4 µg/L
No 8
C+
231 Berlin Boro-0405 5.3 µg/L
No 1
B+
232 Pennsville Twp.-1708 5.2 µg/L
No 5
C-
233 Parsippany Troy-Hills-1429 5.2 µg/L
No 5
F
234 Seaside Park Boro-1527 4.6 µg/L
No 1
A-
235 Absecon City-0101 4.5 µg/L
No 9
C-
236 Absecon City-0101 4.5 µg/L
No 22
F
237 Absecon City-0101 4.5 µg/L
No 4
B-
238 Absecon City-0101 4.5 µg/L
No 0
A-
239 Absecon City-0101 4.5 µg/L
No 0
A-
240 Absecon City-0101 4.5 µg/L
No 0
A-
241 Absecon City-0101 4.5 µg/L
No 0
A-
242 Wildwood City-0514 4.4 µg/L
No 6
B-
243 Mantua Twp.-0810 3.9 µg/L
No 28
F
244 Ridgewood Twp-0251 3.7 µg/L
No 12
D+
245 Medford Twp.-0320 3.6 µg/L
No 2
C+
246 Collingswood Boro-0412 3.3 µg/L
No 4
B+
247 Woodbury City-0822 3.3 µg/L
No 0
B
248 Seaside Heights Boro-1526 3.2 µg/L
No 0
A-
249 Orange City-0717 3.1 µg/L
No 5
C+
250 Hawthorne Boro-1604 3.1 µg/L
No 3
D+
251 Buena Boro-0104 3.1 µg/L
No 1
A
252 Beachwood Boro-1504 3.1 µg/L
No 0
B-
253 Wall Twp.-1352 3.0 µg/L
No 1
B
254 Mount Holly Twp.-0323 2.9 µg/L
No 0
B+
255 Little Egg Harbor-1516 2.8 µg/L
No 1
A
256 Hillsdale Boro-0227 2.8 µg/L
No 2
C+
257 Hillsdale Boro-0227 2.8 µg/L
No 2
C+
258 Long Beach Twp.-1517 2.6 µg/L
No 0
F
259 Hackettstown Town-2108 2.5 µg/L
No 2
B-
260 Sparta Twp.-1918 2.5 µg/L
No 11
F
261 Gloucester City-0414 2.3 µg/L
No 2
A-
262 Clinton Town -1005 2.1 µg/L
No 2
D
263 Hamilton Twp-0112 2.1 µg/L
No 4
C
264 Hamilton Twp-0112 2.1 µg/L
No 4
C+
265 Berkeley Twp.-1505 2.0 µg/L
No 2
C+
266 Oakland Boro-0242 1.9 µg/L
No 2
B-
267 Stafford Twp.-1530 1.9 µg/L
No 3
B
268 Monroe Twp.-0811 1.9 µg/L
No 9
C
269 Jackson Twp.-1511 1.9 µg/L
No 18
F
270 Bridgeton City-0601 1.8 µg/L
No 55
D
271 Pine Hill Boro-0428 1.8 µg/L
No 0
A-
272 Washington Boro-2121 1.8 µg/L
No 0
B+
273 Barnegat Twp.-1533 1.6 µg/L
No 2
B+
274 Rockaway Twp.-1435 1.5 µg/L
No 8
F
275 Paulsboro Boro-0814 1.5 µg/L
No 6
B+
276 Dover Town-1409 1.5 µg/L
No 10
C-
277 Oldmans Twp.-1706 1.4 µg/L
No 3
B-
278 Oldmans Twp.-1706 1.4 µg/L
No 3
B-
279 Oldmans Twp.-1706 1.4 µg/L
No 1
B+
280 Jefferson Twp.-1414 1.4 µg/L
No 36
F
281 Belmar Boro-1306 1.4 µg/L
No 3
B-
282 Willingboro Twp.-0338 1.4 µg/L
No 1
B
283 Sea Isle City-0509 1.3 µg/L
No 0
A-
284 Camden City-0408 1.2 µg/L
No 8
C+
285 Ship Bottom Boro-1528 1.2 µg/L
No 2
A-
286 Manchester Twp.-1518 1.1 µg/L
No 23
F
287 Cape May City-0502 0.9 µg/L
No 9
B
288 Barnegat Twp.-1533 0.9 µg/L
No 5
C+
289 Beach Haven Boro-1503 0.8 µg/L
No 1
A-
290 Pompton Lakes Boro-1609 0.8 µg/L
No 0
C
291 Madison Boro-1417 0.8 µg/L
No 7
B-
292 East Windsor Twp.-1101 0.8 µg/L
No 1
A-
293 Freehold Boro-1315 0.7 µg/L
No 3
B-
294 Franklin Boro-1906 0.7 µg/L
No 6
B-
295 Pemberton Twp.-0329 0.7 µg/L
No 21
D
296 Vineland City-0614 0.7 µg/L
No 70
F
297 Pine Beach Boro-1522 0.6 µg/L
No 0
A
298 Millville City-0610 0.4 µg/L
No 3
F
299 Lacey Twp.-1512 0.4 µg/L
No 2
B+
300 Denville Twp.-1408 0.4 µg/L
No 4
F
301 Bordentown Twp.-0304 0.4 µg/L
No 17
C
302 Bordentown Twp.-0304 0.4 µg/L
No 14
B-
303 Bordentown Twp.-0304 0.4 µg/L
No 14
B-
304 Hammonton Town-0113 0.4 µg/L
No 38
C+
305 Randolph Twp.-1432 0.3 µg/L
No 3
B+
306 Franklin Twp.-0805 0.3 µg/L
No 19
F
307 Franklin Twp.-0805 0.3 µg/L
No 5
B+
308 Roxbury Twp.-1436 0.1 µg/L
No 8
D+
309 Washington Twp.-0818 0.0 µg/L
No 0
F
FAQ

Frequently asked questions about haa5 in New Jersey

What is HAA5 and why does it appear in New Jersey tap water?

HAA5 (haloacetic acids) are disinfection byproducts that form when chlorine reacts with naturally occurring organic matter in source water. They are a normal byproduct of the disinfection process that makes water safe to drink. 2 cities in New Jersey exceed the EPA MCL of 60 µg/L. The state average is 12.0 µg/L.

How can I reduce HAA5 exposure from New Jersey drinking water?

Activated carbon filters (granular or block) effectively reduce HAA5. Refrigerator filters and under-sink carbon systems are convenient options. Unlike lead or PFAS, HAA5 levels can also be reduced by letting water stand in an open container, as some species evaporate. Boiling does NOT remove HAA5 and can concentrate them by reducing water volume.

Which New Jersey cities have the highest HAA5 levels?

The cities with the highest average HAA5 concentrations in New Jersey are: Hillside Twp.-2007 (65.5 µg/L), Hillside Twp.-2007 (62.5 µg/L), Hillside Twp.-2007 (56.4 µg/L), Nutley Town-0716 (49.0 µg/L), Hillside Twp.-2007 (47.4 µg/L). Note: this data is from UCMR 4 testing (2018–2020) and may not reflect current levels.

More contaminants

Other contaminants in New Jersey

Lead in New Jersey
Ranked by 90th percentile level (ppb)
→
PFAS in New Jersey
Ranked by compounds detected
→
Copper in New Jersey
Ranked by 90th percentile level (mg/L)
→
Chromium-6 in New Jersey
Ranked by max detected (µg/L)
→
Arsenic in New Jersey
Ranked by violation count
→
Nitrate in New Jersey
Ranked by violation count
→
Strontium in New Jersey
Ranked by max detected (µg/L)
→
1,4-Dioxane in New Jersey
Ranked by max detected (µg/L)
→
Manganese in New Jersey
Ranked by max detected (µg/L)
→
Vanadium in New Jersey
Ranked by max detected (µg/L)
→
Chlorate in New Jersey
Ranked by max detected (µg/L)
→
Molybdenum in New Jersey
Ranked by max detected (µg/L)
→
Cobalt in New Jersey
Ranked by max detected (µg/L)
→
Lithium in New Jersey
Ranked by max detected (µg/L)
→
NDMA in New Jersey
Ranked by max detected (ng/L)
→
Perchlorate in New Jersey
Ranked by max detected (µg/L)
→
All states

HAA5 in drinking water by state

AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of ColumbiaFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaQCRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming
← HAA5 contamination overview Explore New Jersey water quality → National HAA5 map →