Yelm WWTP
931 Northern Pacific Rd SE, Yelm, WA 98597 · Thurston County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- WA0040762
- Administratively continued
- Permit expires
- July 2016
- Population served
- 13,976
- CWNS 2022
Yelm WWTP is a publicly owned wastewater treatment works in Yelm, Thurston County, Washington, serving about 13,976 residents. It discharges under NPDES permit WA0040762 (administratively continued), which expires in July 2016, with 19 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Yelm WWTP.
Available with a free Klarifi account
See the full treatment train at Yelm WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 19
- Effluent violations
- 19
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 Yelm WWTP in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 1
- latest Jun 2023
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Yelm WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
1 verified contact for Yelm WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Yelm WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Washington
Olympia · 16 mi away
12.08 MGD
Eatonville · 17 mi away
0.24 MGD
University Place · 17 mi away
22.49 MGD
Olympia · 20 mi away
0.03 MGD
Orting · 21 mi away
0.91 MGD
Puyallup · 22 mi away
5.2 MGD
Rochester · 23 mi away
0.17 MGD
Littlerock · 26 mi away
0.05 MGD
Yelm 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 August 11, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms