City Of Louisville
1601 Empire Road, Louisville, CO 80027 · Boulder County · Publicly Owned Treatment Works
- Average flow
- 2.34 MGD
- Design flow
- 3.4 MGD
- NPDES permit
- CO0023078
- Administratively continued
- Permit expires
- September 2016
- Population served
- 21,171
- CWNS 2022
City Of Louisville is a publicly owned wastewater treatment plant in Louisville, Boulder County, Colorado treating an average of 2.34 million gallons per day against a permitted design capacity of 3.4 MGD, serving about 21,171 residents. It discharges under NPDES permit CO0023078 (administratively continued), which expires in September 2016, with 2 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in June 2018.
Treatment technology
One treatment structure or unit process identified at City Of Louisville.
Available with a free Klarifi account
See the full treatment train at City Of Louisville: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
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 City Of Louisville in EPA's ICIS system.
- Formal actions
- 2
- 0 since FY2020
- Penalties assessed
- $25,000
- all cases
- EPA inspections
- 4
- latest Oct 2021
Latest case · Jun 2018
City of Louisville
Administrative order · CWA, Effluent Limitations - NPDES Toxic & Pretreatment Effluent Standards · Final Order With Penalty · Penalty $25,000
EPA's description of the case:
“This Complaint proposes a penalty for failing to implement its approved pretreatment program in multiple areas. Violations addressed by the Consent Order include: violations of the City?s manganese…”
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Source: EPA ECHO, civil enforcement case 08-2017-0104.
Full case history with a free Klarifi account
Every action against City Of Louisville with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at City Of Louisville.
No verified contacts on file yet
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Nearby wastewater treatment plants in Colorado
Lafayette · 4 mi away
2.39 MGD
Westminster · 7 mi away
6.94 MGD
Eldorado Springs · 9 mi away
0.02 MGD
Brighton · 9 mi away
3.11 MGD
Jefferson County · 15 mi away
1.66 MGD
City Of Longmont · 15 mi away
3.34 MGD
Fort Lupton · 17 mi away
3.02 MGD
Mead · 19 mi away
0.23 MGD
City Of Louisville: 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 19, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms