B74/100
CARY, TOWN OF — Water Quality Report 2026
Serving 224,000 people · North Carolina
Water Source
Surface Water
County
—
System ID
NC0392020
Violations
15
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
1,4-dioxane | 0.770 µg/L | — | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: May 10, 2023 – February 13, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
TIER 1 — URGENTResolved
Maximum Contaminant Level Violation
When: May 1, 2023 – May 31, 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 CARY, TOWN OF
Is CARY, TOWN OF water safe to drink?
CARY, TOWN OF water receives a grade of B (74/100), which is considered good. Out of 76 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has CARY, TOWN OF detected?
76 contaminants were tested in CARY, TOWN OF's water. Notable contaminants include 1,4-dioxane. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CARY, TOWN OF have any EPA violations?
Yes, CARY, TOWN OF has 15 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MCL, MR. 2 are health-based violations.
How many people does CARY, TOWN OF serve?
CARY, TOWN OF serves approximately 224,000 people, North Carolina. The system provides water to 1 community: Cary.
What type of water does CARY, TOWN OF provide?
CARY, TOWN OF sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is NC0392020.
How does CARY, TOWN OF compare to other utilities in North Carolina?
CARY, TOWN OF scores 74/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our North Carolina state page for a full comparison of water systems.