- EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
- Lithium: found in 7 of 10 samples, average 10.8 µg/L, highest 29.5 µg/L (EPA UCMR 5 testing, Feb 2023–Aug 2023)
Public EPA test results
What EPA records show for Onslow WTR and Sewer Authority
EPA system ID NC0467035 · serves Jacksonville, NC · about 156,755 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
Onslow WTR and Sewer Authority (EPA NC0467035)
What EPA records show for Onslow WTR and Sewer Authority, as of October 14, 2026
Health-standard violation: Lead and Copper Rule, LEAD AND COPPER RULE REVISIONS, Oct 2024–Nov 2024 (EPA SDWIS).
Lead: 9 in 10 homes tested came in at or below 0 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2023–Dec 31, 2025). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Onslow WTR and Sewer Authority use chloramine?
We didn't find chloramine in Onslow WTR and Sewer Authority's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)