Onslow, NC
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for Onslow in North Carolina · Population: 208,537
Onslow, NC is tracked across three EPA datasets covering 6 Toxics Release Inventory (TRI) facilities, 18 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 41/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 4.1M lbs of reported toxic releases under EPCRA Section 313, while 10 water systems carry an active health-based violation in the SDWIS record. No EPA Air Quality System monitors currently report data for this county.
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
Water Systems (18)
| System | Population | Violations |
|---|---|---|
| ONSLOW WTR AND SEWER AUTHORITY | 156,755 | 2 |
| USMC LEJEUNE--HADNOT POINT | 37,500 | 0 |
| USMC LEJEUNE--HOLCOMB BLVD | 17,000 | 1 |
| USMC LEJEUNE--NEW RIVER AIR ST | 11,500 | 0 |
| SURF CITY, TOWN OF | 9,730 | 1 |
| TOPSAIL BEACH, TOWN OF | 3,584 | 22 |
| USMC LEJEUNE--RIFLE RANGE | 3,500 | 1 |
| OLD SETTLERS WATER SYSTEM | 2,677 | 1 |
| NORTHWEST ONSLOW WATER ASSOC | 2,555 | 0 |
| LAURADALE S/D | 2,527 | 9 |
| RAINTREE/SUMMERSILL ESTATES #2 | 1,539 | 0 |
| ROBERSONVILLE, TOWN OF | 1,445 | 1 |
| MAYSVILLE, TOWN OF | 1,100 | 0 |
| OSPREY COVE 2 | 475 | 0 |
| OSPREY COVE 1 | 475 | 0 |
| SHERWOOD MHP | 470 | 0 |
| SUMMERSILL ESTATES NO 1 | 163 | 1 |
| SOUTHGATE MHP | 94 | 19 |
TRI Facilities (6)
| # | Facility | Total Releases |
|---|---|---|
| 1 | McIeast-Mcb Camlej Main Facility | 4.1M lbs |
| 2 | Stanadyne Operating Co LLC | 1 lbs |
| 3 | P4 Jacksonville Plant | 0 lbs |
| 4 | S&w Holly Ridge Plant | 0 lbs |
| 5 | S&w Hubert Plant | 0 lbs |
| 6 | Msa Safety Jacksonville Manufacturing LLC | 0 lbs |
Cities in Onslow (5)
Frequently Asked Questions
What is the environmental risk level in Onslow, North Carolina? ▼
Are there Superfund sites in Onslow? ▼
How many toxic release facilities are in Onslow? ▼
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What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.