Mawc, Eureka WWTF
Augustine Rd, Eureka, MO 63025 · St. Louis County · Publicly Owned Treatment Works
- Average flow
- 1.54 MGD
- Design flow
- —
- NPDES permit
- MO0039659
- Expired
- Permit expires
- September 2022
- Population served
- —
- CWNS 2022
Mawc, Eureka WWTF is a publicly owned wastewater treatment works in Eureka, St. Louis County, Missouri treating an average of 1.54 million gallons per day. It discharges under NPDES permit MO0039659 (expired), which expires in September 2022, with 5 recorded violations in the last three years.
Treatment technology
4 treatment structures and unit processes identified, 1 planned upgrade on record at Mawc, Eureka WWTF.
Available with a free Klarifi account
See the full treatment train at Mawc, Eureka WWTF: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Mawc, Eureka WWTF.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Missouri
Eureka · 2 mi away
0.15 MGD
High Ridge · 3 mi away
0.02 MGD
High Ridge · 4 mi away
0.0041 MGD
House Springs · 6 mi away
0.24 MGD
House Springs · 6 mi away
0.06 MGD
House Springs · 6 mi away
0.005 MGD
House Springs · 7 mi away
0.0087 MGD
House Springs · 7 mi away
0.01 MGD
Mawc, Eureka WWTF: 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 April 24, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms