Wallingford Water Department
EPA ID: CT1480011 · 37,267 people served · 8 ZIP codes
Five-year compliance data for Wallingford Water Department includes 4 violations the EPA has not yet marked resolved — those open findings are part of the utility's current enforcement profile, covering a service population of approximately 37,267 residents across the area it supplies.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 4 (2023) to 5 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Wallingford Water Department Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Wallingford Water Department serves a community with a median household income of $105,227 and an estimated 153,272 residents across its service area. Approximately 73% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Wallingford Water Department's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How Wallingford Water Department compares to EPA limits
What This Means For You
Lead at 2 mg/L (action level) exceeds the EPA maximum of 0.015 mg/L (action level). Brain damage in children, kidney & blood pressure in adults. Consider reverse osmosis filtration.
Stage 1 DBP Rule at 7 mg/L exceeds the EPA maximum of mg/L.
Surface Water Treatment Rule at 4 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 4 mg/L exceeds the EPA maximum of mg/L.
Stage 2 DBP Rule at 2 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 30 detections recorded. 13 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Lead was detected in this water system. reverse osmosis filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
WALLINGFORD WATER DEPARTMENT (EPA ID: CT1480011) is a community water system in Connecticut that serves approximately 37,267 people from surface water sources.
This system provides water to 8 ZIP codes across 5 communities.
Average Home Safety Score: C (55/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| April 1, 2025 | Lead | Monitoring | Unresolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Unresolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Unresolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2024 | Contaminant 1044 | Monitoring | Resolved |
| April 1, 2024 | Contaminant 2998 | Monitoring | Resolved |
| March 31, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| March 16, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| December 22, 2023 | Lead and Copper Rule | Monitoring | Resolved |
| November 23, 2023 | Contaminant 0700 | Health-based | Resolved |
| July 27, 2023 | Lead and Copper Rule | Monitoring | Resolved |
| July 1, 2023 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2023 | Revised Total Coliform Rule | Monitoring | Resolved |
| May 17, 2023 | Lead and Copper Rule | Monitoring | Resolved |
| January 1, 2023 | Stage 1 DBP Rule | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Stage 1 DBP Rule | Treatment Failure | 7 | No |
| Surface Water Treatment Rule | Treatment Failure | 4 | No |
| Lead and Copper Rule | Treatment Failure | 4 | No |
| Lead | Inorganic | 2 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Revised Total Coliform Rule | Microbiological | 2 | No |
| Contaminant 1044 | Other Violation | 1 | No |
| Contaminant 2998 | Other Violation | 1 | No |
| Contaminant 0700 | Other Violation | 1 | Yes |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 06492 | 0.0004 mg/L | No | N/A |
| 06493 | 0.0004 mg/L | No | N/A |
| 06494 | 0.0004 mg/L | No | N/A |
| 06495 | 0.0004 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 4 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 4 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 06410 — Cheshire
- 06450 — Meriden
- 06473 — North Haven
- 06492 — Wallingford
- 06493 — Wallingford
- 06494 — Wallingford
- 06495 — Wallingford
- 06518 — Hamden
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Wallingford Water Department (CT1480011) on EPA.gov.
Frequently Asked Questions
Is Wallingford Water Department water safe to drink?
Wallingford Water Department has recorded 2 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.
How many people does Wallingford Water Department serve?
Wallingford Water Department serves approximately 37,267 people across 8 ZIP codes in Connecticut.
Where does Wallingford Water Department get its water?
The primary water source is surface water.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from Wallingford Water Division Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: Wallingford Water Division Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Source water assessments of the Town's water supplies by the Drinking Water Section of the Connecticut Department of Public Health (DPH) include ratings of their potential for contamination, but do not necessarily imply poor water quality. These reports show that our reservoirs have low susceptibility, while our groundwater sources range from low to high.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment chemicals and what each one does
Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.
Treatment classification and chemical list sourced from Wallingford Water Division Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
Federal UCMR5 PFAS Monitoring: Above Current MCL
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). One or more PFAS compounds were measured above the current state-enforceable MCL.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Notable events and violations
This section summarizes events the utility chose to disclose in its most recent Consumer Confidence Report, plus any federal compliance violations the utility recorded against itself. Both lists are utility-authored — ZipCheckup does not audit, judge, or reorder them.
Federal compliance violations on record
These entries are taken verbatim from the utility's CCR violations section. EPA defines four broad violation categories: Maximum Contaminant Level (MCL), Treatment Technique (TT), Monitoring & Reporting (M&R), and Public Notification (PN).
-
monitoring · Organic Chemicals2024-04-01 to 2024-06-30
Failed to complete monitoring for Organic Chemicals at Oak Street Wells 2 and 3 Entry Point.
Violations record from Wallingford Water Division Consumer Confidence Report.
Notable events from the utility's CCR
These bullet entries are the utility's own narration of operational, regulatory, or infrastructure events during the reporting period.
- Monitoring and/or reporting violation for Organic Chemicals at Oak Street Wells 2 and 3 for the period April 1, 2024 – June 30, 2024.
ZipCheckup note: items above reflect what the utility published in its most recent CCR. Federal violation records are also tracked separately by the EPA Safe Drinking Water Information System (SDWIS) — the SDWIS record is the authoritative federal source for any specific regulatory action.
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Wallingford Water Department (EPA ID: CT1480011) — request the latest Consumer Confidence Report or ask about specific contaminants.