F2/100
ONSLOW WTR AND SEWER AUTHORITY — Water Quality Report 2026
Serving 156,755 people · North Carolina
Water Source
Groundwater
County
—
System ID
NC0467035
Violations
75
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 374.98 µg/L | — | Above Goal |
EPA Violation History
5
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: October 28, 2024 – December 18, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024 – November 7, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – November 7, 2024Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Monitoring violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 11, 2023 – January 3, 2024Rule: Total Coliform RuleEnforcement: Formal — state order issued
TIER 3Resolved
Monitoring violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 11, 2023Rule: Total Coliform RuleEnforcement: Formal — state order issued
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About ONSLOW WTR AND SEWER AUTHORITY
Is ONSLOW WTR AND SEWER AUTHORITY water safe to drink?
ONSLOW WTR AND SEWER AUTHORITY water receives a grade of F (2/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 75 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has ONSLOW WTR AND SEWER AUTHORITY detected?
73 contaminants were tested in ONSLOW WTR AND SEWER AUTHORITY's water. Notable contaminants include chlorate. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ONSLOW WTR AND SEWER AUTHORITY have any EPA violations?
Yes, ONSLOW WTR AND SEWER AUTHORITY has 75 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, RPT, TT. 5 are health-based violations.
How many people does ONSLOW WTR AND SEWER AUTHORITY serve?
ONSLOW WTR AND SEWER AUTHORITY serves approximately 156,755 people, North Carolina. The system provides water to 1 community: Jacksonville.
What type of water does ONSLOW WTR AND SEWER AUTHORITY provide?
ONSLOW WTR AND SEWER AUTHORITY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is NC0467035.
How does ONSLOW WTR AND SEWER AUTHORITY compare to other utilities in North Carolina?
ONSLOW WTR AND SEWER AUTHORITY scores 2/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our North Carolina state page for a full comparison of water systems.