Mendenhall Valley WWTP
2009 Radcliffe Rd, Juneau, AK 99801 · Juneau County · Publicly Owned Treatment Works
- Average flow
- 2.15 MGD
- Design flow
- —
- NPDES permit
- AK0022951
- Administratively continued
- Permit expires
- May 2025
- Population served
- 18,158
- CWNS 2022
Mendenhall Valley WWTP is a publicly owned wastewater treatment works in Juneau, Juneau County, Alaska treating an average of 2.15 million gallons per day, serving about 18,158 residents. It discharges under NPDES permit AK0022951 (administratively continued), which expires in May 2025, with 63 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in July 2021.
Treatment technology
6 treatment structures and unit processes identified, 1 planned upgrade on record at Mendenhall Valley WWTP.
Available with a free Klarifi account
See the full treatment train at Mendenhall Valley WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 63
- Effluent violations
- 44
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Mendenhall Valley WWTP in EPA's ICIS system.
- Formal actions
- 3
- 0 since FY2020
- Penalties assessed
- $66,793
- all cases
- Compliance actions
- $25,000
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Jul 2021
CITY AND BOROUGH OF JUNEAU - MENDENHALL WASTEWATER TREATMENT FACILITY
Administrative order · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $30,000
EPA's description of the case:
“Clean Water Act violations.”
Source: EPA ECHO, civil enforcement case 10-2000-0095.
Full case history with a free Klarifi account
Every action against Mendenhall Valley WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Juneau
Juneau's capital improvement plan lists 113 water, sewer and wastewater line items worth $431M starting 2026–2031. The largest budgeted items are shown here.
All water and sewer capital projects in Juneau →
| Project | Budget | Years |
|---|---|---|
| MWWTP Augmentation / Replacement | $86,500,000 | 2031–2031 |
| MWWTP Conversion to AGS | $25,300,000 | 2031–2031 |
| Additional Street Reconstructions | $18,865,000 | 2027–2031 |
| S Franklin - Taku Smokeries to Baranof replacement or slip line | $11,000,000 | 2031–2031 |
| WW Collections Operations Shop | $10,285,000 | 2027–2031 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
6 verified contacts for Mendenhall Valley WWTP, with validated emails and direct phone numbers.
Unlock 6 verified contacts (3 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Mendenhall Valley WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Alaska
Juneau · 3 mi away
0.05 MGD
Juneau · 9 mi away
0.96 MGD
Skagway · 80 mi away
0.21 MGD
Petersburg · 123 mi away
0.43 MGD
Thorne Bay · 201 mi away
0.22 MGD
Ketchikan · 225 mi away
0.00000022 MGD
Ketchikan · 235 mi away
1.61 MGD
Ketchikan · 241 mi away
0.48 MGD
Mendenhall Valley 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 September 1, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms