Johnson City Water Department
EPA ID: TN0000331 · 105,057 people served · 21 ZIP codes
With 2 unresolved EPA violations, Johnson City Water Department is currently out of full compliance — approximately 105,057 people in its service area.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 7 (2022) to 6 (2025). Violation counts have remained relatively steady.
Service Area Map
Coverage area for Johnson City Water Department Source: EPA SDWIS service area boundaries.
Service area boundary — Grade C
Service Area Demographics
The Johnson City Water Department serves a community with a median household income of $62,877 and an estimated 250,406 residents across its service area. Approximately 52% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 57% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
Johnson City 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.
About 1% of homes in Washington County, Tennessee rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Johnson City Water Department compares to EPA limits
What This Means For You
Contaminant 2105 at 1 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 1 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. 11 detections recorded. 7 exceed federal EPA limits (4 ppt for PFOA/PFOS). 7 exceed state limits.
Comparable Water Systems
Similar-sized systems in Tennessee
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
Johnson City Water Department (EPA ID: TN0000331) is a community water system in Tennessee that serves approximately 105,057 people from surface water sources.
This system provides water to 21 ZIP codes across 16 communities.
Average Home Safety Score: C (56/100)
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 |
|---|---|---|---|
| February 4, 2023 | Lead and Copper Rule | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Contaminant 2105 | Other Violation | 1 | No |
| Lead and Copper Rule | Treatment Failure | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 37601 | 0.0013 mg/L | No | N/A |
| 37602 | 0.0013 mg/L | No | N/A |
| 37604 | 0.0013 mg/L | No | N/A |
| 37605 | 0.0013 mg/L | No | N/A |
| 37614 | 0.0013 mg/L | No | N/A |
| 37615 | 0.0013 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: 16 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 5 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.
- 37601 — Johnson City
- 37602 — Johnson City
- 37604 — Johnson City
- 37605 — Johnson City
- 37614 — Johnson City
- 37615 — Johnson City
- 37617 — Blountville
- 37618 — Bluff City
- 37643 — Elizabethton
- 37650 — Erwin
- 37656 — Fall Branch
- 37657 — Flag Pond
- 37659 — Jonesborough
- 37663 — Kingsport
- 37681 — Limestone
- 37682 — Milligan College
- 37684 — Mountain Home
- 37686 — Piney Flats
- 37690 — Telford
- 37692 — Unicoi
- 37694 — Watauga
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Johnson City Water Department (TN0000331) on EPA.gov.
Frequently Asked Questions
Is Johnson City Water Department water safe to drink?
Johnson City Water Department has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does Johnson City Water Department serve?
Johnson City Water Department serves approximately 105,057 people across 21 ZIP codes in Tennessee.
Where does Johnson City Water Department get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
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.
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.
- #18 / 50 Highest Exposure Burden (Tennessee)
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
Johnson City Water Department (EPA ID: TN0000331) — request the latest Consumer Confidence Report or ask about specific contaminants.