Mountain City WWTP
1022 Lumpkin Branch Rd, Mountain City, TN 37683 · Johnson County · Publicly Owned Treatment Works
- Average flow
- 0.81 MGD
- Design flow
- 1.2 MGD
- NPDES permit
- TN0024945
- Effective
- Permit expires
- July 2031
- Population served
- 2,062
- CWNS 2022
Mountain City WWTP is a publicly owned wastewater treatment works in Mountain City, Johnson County, Tennessee treating an average of 0.81 million gallons per day against a permitted design capacity of 1.2 MGD, serving about 2,062 residents. It discharges under NPDES permit TN0024945 (effective), which expires in July 2031, with 67 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Mountain City WWTP.
Available with a free Klarifi account
See the full treatment train at Mountain City WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 67
- Effluent violations
- 59
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Mountain City WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Mountain City WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Tennessee
Roan Mountain · 22 mi away
0.0028 MGD
Hampton · 23 mi away
0.0046 MGD
Elizabethton · 23 mi away
0.007 MGD
Roan Mountain · 25 mi away
0.0036 MGD
Elizabethton · 25 mi away
1.93 MGD
Johnson City · 29 mi away
5.94 MGD
Johnson City · 31 mi away
3.26 MGD
Blountville · 32 mi away
0.0055 MGD
Mountain City WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026; facility record last updated May 25, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms