County · New Jersey
Monmouth County, New Jersey: drinking water records
This overview covers 49 ZIP codes and 39 community water systems in Monmouth County. It also stands in for 2 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Nj American Water - Coastal North NJ1345001 | 377,613 | 1,140 | 5 | 1 | 2 ppb |
| Belmar Water Dept NJ1306001 | 20,000 | 150 | 3 | 1 | 0.7 ppb |
| Manasquan Water Departme NJ1327001 | 14,000 | 60 | 0 | 1 | 0.6 ppb |
| Freehold Borough Water D NJ1315001 | 11,029 | 60 | 0 | 1 | 0.8 ppb |
| Matawan Borough Water de NJ1329001 | 9,084 | 180 | 4 | 1 | 0 ppb |
| Aberdeen - Cliffwood/Cliffwood Beach NJ1330002 | 6,775 | 120 | 0 | 3 | 0 ppb |
| Avon By the Sea Water de NJ1305001 | 5,000 | 180 | 4 | 1 | 2.0 ppb |
| Gordons Corner Water Co NJ1326001 | 46,196 | 360 | 3 | 0 | 2.3 ppb |
| Freehold TWP Water Dept NJ1316001 | 29,831 | 300 | 5 | 0 | 0 ppb |
| Marlboro Township Water Utility Division NJ1328002 | 29,480 | 240 | 3 | 0 | 1 ppb |
| Wall TWP Water Dept NJ1352003 | 26,000 | 390 | 4 | 0 | 0.5 ppb |
| Red Bank Water Dept NJ1340001 | 12,520 | 240 | 3 | 0 | 0.7 ppb |
| Spring Lake Water Department NJ1348001 | 11,270 | 240 | 0 | 0 | 0 ppb |
| Keansburg Water & Sewer Dept. NJ1321001 | 10,105 | 180 | 3 | 0 | 0.6 ppb |
| Manalapan TWP - Knob Hill NJ1326002 | 8,700 | 180 | 4 | 0 | 2.6 ppb |
| Keyport Water Dept NJ1322001 | 7,500 | 150 | 3 | 0 | 0 ppb |
| Borough of Springlake Heights NJ1349001 | 5,000 | 180 | 5 | 0 | 2.5 ppb |
| Brielle Water Dept NJ1308001 | 4,800 | 240 | 1 | 0 | 0.4 ppb |
| Atlantic Highlands Water NJ1304001 | 4,385 | 60 | 0 | 0 | 1.6 ppb |
| Lake Como Water Dept NJ1347001 | 3,000 | 0 | 0 | 4 | 0 ppb |
| Englishtown Water Dept NJ1312001 | 2,504 | 180 | 3 | 0 | 0.5 ppb |
| Allentown Water Dept NJ1302001 | 2,000 | 60 | 0 | 0 | 1.0 ppb |
| Us Naval Weapons Station NJ1309001 | 1,200 | 0 | 0 | 2 | 10 ppb |
| Gateway Nra Sandy Hook NJ1331001 | 500 | 0 | 0 | 2 | 2.3 ppb |
| Brandywine Assisted Living at Colts Neck NJ1309415 | 85 | 0 | 0 | 2 | 0 ppb |
ZIP reports in Monmouth County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 07730, 08510.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.