County · North Carolina
Johnston County, North Carolina: drinking water records
This overview covers 11 ZIP codes and 47 community water systems in Johnston County. It also stands in for 0 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 |
|---|---|---|---|---|---|
| Smithfield, Town of NC0351010 | 12,900 | 45 | 6 | 1 | 0 ppb |
| Selma, Town of NC0351015 | 6,190 | 60 | 7 | 1 | 0 ppb |
| Selma, Town of (County Line) NC4051009 | 642 | 95 | 6 | 3 | 21 ppb |
| Johnston Co-West NC0351070 | 99,027 | 480 | 8 | 0 | 0 ppb |
| Clayton, Town of NC0351020 | 30,876 | 95 | 5 | 0 | 0 ppb |
| Johnston Co-East NC4051018 | 25,212 | 600 | 8 | 0 | 0 ppb |
| Flowers Plantation NC0351195 | 11,643 | 120 | 8 | 0 | 0 ppb |
| Benson, Town of NC0351025 | 4,802 | 240 | 8 | 0 | 0 ppb |
| Pine Level, Town of NC0351040 | 2,413 | 0 | 0 | 1 | 1.4 ppb |
| Four Oaks, Town of NC0351035 | 2,302 | 0 | 0 | 7 | 3 ppb |
| Kenly, Town of NC0351030 | 2,301 | 0 | 0 | 13 | 0 ppb |
| Princeton, Town of NC0351050 | 1,653 | 0 | 0 | 2 | 0 ppb |
| Smithfield South Water Dist NC4051007 | 803 | 0 | 0 | 1 | 0 ppb |
| Pine Level, Town of (Firetower) NC4051006 | 238 | 0 | 0 | 7 | 0 ppb |
| Southgate S/D NC0351185 | 160 | 120 | 6 | 0 | 0 ppb |
| Micro, Town of (County Line) NC4051008 | 107 | 0 | 0 | 7 | 0 ppb |
| Town of Clayton - North NC4051019 | 4,703 | 0 | 0 | 0 | 0 ppb |
| Winston Pointe S/D NC4051012 | 1,326 | 0 | 0 | 0 | 0 ppb |
| Buffalo Creek S/D NC0351189 | 721 | 0 | 0 | 0 | 0 ppb |
| Southhills Southwoods Sd NC0351168 | 716 | 0 | 0 | 0 | 0 ppb |
| Riverwood S/D NC0351187 | 553 | 0 | 0 | 0 | 0 ppb |
| White Oak Plantation NC0351160 | 521 | 0 | 0 | 0 | 0 ppb |
| Creekstone S/D NC0351186 | 505 | 0 | 0 | 0 | 0 ppb |
| Micro, Town of NC0351045 | 470 | 0 | 0 | 0 | 4 ppb |
| Willowbrook Development NC0351166 | 432 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Johnston County
No ZIP report in this county is published yet.
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.