Water Quality in 27511 — Cary, NC
EPA data for CARY, TOWN OF
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 27511 in Cary, North Carolina is served by CARY, TOWN OF (EPA ID: NC0392020). This system provides water to approximately 224,000 people from surface water sources.
There are 709 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 1, 2025 | Stage 1 DBP Rule | Monitoring | Unresolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2025 | Stage 1 DBP Rule | Monitoring | Unresolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2025 | Surface Water Treatment Rule | Monitoring | Resolved |
| April 1, 2025 | Gross Alpha | Monitoring | Unresolved |
| April 1, 2025 | Gross Alpha | Monitoring | Resolved |
| April 1, 2025 | Combined Radium | Monitoring | Unresolved |
| April 1, 2025 | Combined Radium | Monitoring | Resolved |
| April 1, 2025 | Gross Beta | Monitoring | Unresolved |
| April 1, 2025 | Gross Beta | Monitoring | Resolved |
| April 1, 2025 | Radium-226 | Monitoring | Unresolved |
| April 1, 2025 | Radium-226 | Monitoring | Resolved |
| April 1, 2025 | Radium-228 | Monitoring | Unresolved |
| April 1, 2025 | Radium-228 | Monitoring | Resolved |
| March 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| March 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| March 1, 2025 | Revised Total Coliform Rule | Monitoring | Unresolved |
| March 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| January 1, 2025 | Stage 1 DBP Rule | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | 20 | No |
| Consumer Confidence Report Rule | Reporting | 11 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 11 | No |
| Lead | Inorganic | 10 | No |
| Stage 1 DBP Rule | Treatment Technique | 8 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 6 | No |
| Combined Radium | Radionuclides | 5 | No |
| Revised Total Coliform Rule | Microbiological | 5 | No |
| Lead and Copper Rule | Treatment Technique | 4 | No |
| Contaminant 2067 | Other | 4 | No |
| Contaminant 2031 | Other | 3 | No |
| Gross Alpha | Radionuclides | 2 | No |
| Gross Beta | Radionuclides | 2 | No |
| Radium-226 | Radionuclides | 2 | No |
| Radium-228 | Radionuclides | 2 | No |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| CARY, TOWN OF | NC0392020 | 224,000 | Surface water |
| BAYLEAF MASTER | NC0392373 | 15,585 | Groundwater |
| BROOKWOOD COMM WTR SYSTEM | NC0326127 | 15,380 | Groundwater |
| CLIFFDALE WEST | NC0326332 | 15,220 | Groundwater |
| FLOWERS PLANTATION | NC0351195 | 11,643 | Surface water |
What You Can Do
- Request your water system’s Consumer Confidence Report (CCR) — Your utility is required to publish this annually
- Consider a home water test — Independent testing can reveal issues in your specific plumbing
- Install a certified water filter — NSF-certified filters can address specific contaminants
- Contact your water provider — Ask about current treatment and any ongoing remediation
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in North Carolina
- 27045 (Rural Hall)
- 27101 (Winston Salem)
- 27203 (Asheboro) — 5 violations
- 27215 (Burlington) — 15 violations
- 27260 (High Point) — 9 violations
- 27284 (Kernersville) — 2 violations
- 27288 (Eden) — 32 violations
- 27292 (Lexington)
- 27320 (Reidsville) — 28 violations
- 27330 (Sanford) — 27 violations
- 27360 (Thomasville) — 3 violations
- 27395 (Greensboro) — 24 violations
- 27502 (Apex) — 32 violations
- 27514 (Chapel Hill) — 79 violations
- 27520 (Clayton) — 9 violations
- 27522 (Creedmoor) — 3 violations
- 27530 (Goldsboro) — 18 violations
- 27536 (Henderson) — 91 violations
- 27573 (Roxboro)
- 27587 (Wake Forest) — 19 violations
Nearby Water Quality Reports
- 27502 (Apex) — 5 mi — 32 violations
- 27601 (Raleigh) — 8 mi — 87 violations
- 27701 (Durham) — 17 mi — 23 violations
- 27514 (Chapel Hill) — 18 mi — 79 violations
- 27587 (Wake Forest) — 20 mi — 19 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for CARY, TOWN OF (NC0392020) on EPA.gov.
Frequently Asked Questions
Is the tap water in 27511 safe to drink?
Cary’s water system has recorded 6 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
Where does 27511’s water come from?
The primary water source for this area is surface water. CARY, TOWN OF serves approximately 224,000 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 27511 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 27511. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 27511?
Radon zone data is not available for ZIP code 27511. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.