PlainWater
Counties → North Carolina

Johnston County, North Carolina

Water Systems
54
Population Served
204,441
Total Violations
7,155
736 health-based
PFAS Detected
9
of 9 tested

Violation Analysis

94.4%
Systems with Violations
132.5
Avg Violations per System
10.3%
Health-Based Violations

Water Source Types

GW
28 systems (52%)
SW
22 systems (41%)

PFAS Contamination

9
Systems Tested
9
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Johnston North Carolina water systems by violation status, EPA SDWIS records.

No violations on record (3) One or more violations (47)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Johnston Co-West 92,365 20 Detected
Clayton, Town Of 29,689 121 Detected
Johnston Co-East 22,967 3 Detected
Smithfield, Town Of 12,900 238 Detected
Flowers Plantation 11,643 45 Detected
Selma, Town Of 6,190 190 Detected
Town of Clayton - North 4,523 5 -
Benson, Town Of 4,293 64 Detected
Four Oaks, Town Of 2,854 159 -
Pine Level, Town Of 2,413 425 -
Kenly, Town Of 2,301 223 -
Princeton, Town Of 1,326 207 -
Winston Pointe S/D 1,326 0 -
Smithfield South Water Dist 803 23 -
Buffalo Creek S/D 721 73 -
Southhills Southwoods SD 716 181 -
Selma, Town of (County Line) 642 43 Detected
Riverwood S/D 553 12 -
White Oak Plantation 521 74 -
Creekstone S/D 505 9 -
Micro, Town Of 470 764 -
Willowbrook Development 432 100 -
Creekside Place S/D 361 8 -
South Plantation S/D 357 7 -
Ole Mill Stream S/D 325 6 -
Stephanie Woods S/D 245 10 -
Pine Level, Town of (Firetower) 238 238 -
Winston Plantation 229 0 -
Tucker Lake 200 93 -
Neuse Colony S/D Section B 190 56 -
Dutchess Downs Mh S/D 185 151 -
Southgate S/D 160 56 Detected
Country Hills S/D 152 112 -
Tippetts Chapel Fwb Church 130 136 -
Southfort S/D 125 3 -
Deerfield S/D 120 6 -
Garner Estates Mh S/D 114 130 -
Heather Downs Mh S/D 112 13 -
Cleveland MHP 107 654 -
Micro, Town of (County Line) 107 245 -
Smithfield Moose Lodge 100 89 -
Shadow Lakes S/D 99 3 -
Albany Acres S/D 81 6 -
Stoneybrook Estates S/D 80 35 -
Adams MHP 80 1,585 -
Gibson Glen S/D 60 3 -
Neighbor`s Walk S/D 60 0 -
Paceville S/D 58 137 -
Clemmons State Forest 50 34 -
Heatherstone S/D 48 6 -

Other Counties in North Carolina

Mecklenburg County
61 systems · 1,181,269 served · 8,081 violations
Wake County
437 systems · 1,145,508 served · 42,422 violations
Guilford County
202 systems · 489,022 served · 30,107 violations
Forsyth County
19 systems · 392,063 served · 2,199 violations
Cumberland County
90 systems · 349,358 served · 9,862 violations
Durham County
50 systems · 329,624 served · 6,257 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Johnston County? ▼
Johnston County has 7,155 total drinking water violations across 54 water systems, of which 736 are health-based violations. 94.4% of systems have at least one violation.
How many people get water from Johnston County systems? ▼
Water systems in Johnston County serve approximately 204,441 people through 54 public water systems.
Has PFAS been detected in Johnston County water? ▼
Of 9 water systems tested for PFAS in Johnston County, 9 had PFAS detected (100.0% detection rate).
What types of water sources supply Johnston County? ▼
Water systems in Johnston County use GW (28 systems), SW (22 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 10.3% of Johnston County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.