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Onslow, NC

Moderate Risk (51/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.

Environmental data for Onslow in North Carolina · Population: 208,537

TRI sites such as McIeast-Mcb Camlej Main Facility; Stanadyne Operating Co LLC; P4 Jacksonville Plant; SDWIS systems such as ONSLOW WTR AND SEWER AUTHORITY; USMC LEJEUNE--HADNOT POINT; USMC LEJEUNE--HOLCOMB BLVD; NPL sites such as ABC One Hour Cleaners; Camp Lejeune Military Reservation anchor Onslow, NC's EPA extract. Derived burden score 51/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in Onslow include ONSLOW WTR AND SEWER AUTHORITY; USMC LEJEUNE--HOLCOMB BLVD; SURF CITY, TOWN OF, while McIeast-Mcb Camlej Main Facility leads reported TRI pounds among local Form R filers. No AQS county monitors report here.

Burden score 51/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Onslow -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

Release-over-release change

What changed for Onslow, NC: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

+50.0%

4 facilities that filed in 2022 and 2023

Whole inventory

+50.0%

661.9 thousand lb → 992.5 thousand lb, every facility that filed

Between the two reporting years, 2 facilities filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.

  • Onslow, NC's total reported releases rose from 661.9 thousand lb in 2022 to 992.5 thousand lb in 2023, based on EPA TRI filings.
  • Onslow, NC's water releases rose from 263.8 thousand lb in 2022 to 606.3 thousand lb in 2023, based on EPA TRI filings.
  • Onslow, NC's chemicals reported fell from 9 in 2022 to 7 in 2023, based on EPA TRI filings.
  • Onslow, NC's air releases fell from 678 lb in 2022 to 607 lb in 2023, based on EPA TRI filings.
County population (Census ACS)
208,537
TRI Facilities
6
Water Systems
17
Superfund Sites
2
Total Releases
4.1M lbs

Water Systems (17)

System System pop (SDWIS) Violations
ONSLOW WTR AND SEWER AUTHORITY 156,755 3
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 2
USMC LEJEUNE--RIFLE RANGE 3,500 1
TOPSAIL BEACH, TOWN OF 3,495 30
OLD SETTLERS WATER SYSTEM 2,677 2
NORTHWEST ONSLOW WATER ASSOC 2,555 0
LAURADALE S/D 2,527 9
RAINTREE/SUMMERSILL ESTATES #2 1,539 0
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

Superfund Sites (2)

Site Name Status HRS Score
ABC One Hour Cleaners NPL Site 29.11
Camp Lejeune Military Reservation NPL Site 33.13

Cities in Onslow (9)

Jacksonville
3 facilities · 10 water
Camp Lejeune
1 facilities · 4 water
Hubert
1 facilities · 1 water
Holly Ridge
1 facilities · 0 water
Maysville
0 facilities · 1 water
Richlands
0 facilities · 1 water
Surf City
0 facilities · 1 water
Topsail Beach
0 facilities · 1 water
Onslow County
0 facilities · 0 water

Frequently Asked Questions

What is the environmental risk level in Onslow, North Carolina? ▼
Onslow, NC has an environmental risk score of 51/100 (Moderate Risk), based on 6 TRI facilities, 2 Superfund sites, and 17 water systems on record. 9 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Onslow? ▼
Yes, Onslow, NC has 2 Superfund sites on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
How many toxic release facilities are in Onslow? ▼
Onslow, NC has 6 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 4.1M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Onslow? ▼
Air quality monitoring data (EPA AQS) is not available for Onslow, NC. This may indicate no EPA monitoring stations are located in the county. For regional air quality data, see the state environmental profile or visit EPA's AirNow.gov.
Is the drinking water safe in Onslow? ▼
Onslow, NC has 17 EPA-regulated water systems. 9 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Onslow? ▼
Environmental compliance in Onslow, North Carolina is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the North Carolina state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

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.

Related Guides

Understanding EPA Data
How EPA collects and publishes environmental data
Environmental Justice
Who lives near polluters and environmental hazards
How to Check Environmental Quality
Step-by-step guide to checking your local environment

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

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Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro