Mendenhall Valley WWTP
Juneau, AK · Juneau County · Publicly Owned Treatment Works
- Average flow
- 2.44 MGD
- Design flow
- —
- NPDES permit
- AK0022951
- Effective
- 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 2.44 million gallons per day, serving about 18,158 residents. Treatment on site includes biosolids mechanical dewatering, biosolids thickening, disinfection, uv, flow equalization, screening and other unit processes. It discharges under NPDES permit AK0022951 (effective), which expires in May 2025, with 59 recorded violations in the last three years. Planned upgrades on record: suspended growth, aerobic.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Biosolids Mechanical Dewatering
unit processBiosolids Thickening
unit processDisinfection, UV
unit processFlow Equalization
unit processScreening
unit processSuspended Growth, Aerobic
unit processSuspended Growth, Aerobic
planned upgradeUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 59
- Effluent violations
- 40
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
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
0.08 MGD
Skagway · 80 mi away
0.25 MGD
Sitka · 95 mi away
1.1 MGD
Petersburg · 123 mi away
0.56 MGD
Thorne Bay · 201 mi away
0.27 MGD
Ketchikan · 225 mi away
0.00000021 MGD
Ketchikan · 235 mi away
5.09 MGD
Ketchikan · 241 mi away
0.55 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 September 11, 2026; facility record last updated September 1, 2025.