California Mens Colony
Highway 1, San Luis Obispo, CA 93409 · San Luis Obispo County · Publicly Owned Treatment Works
- Average flow
- 0.76 MGD
- Design flow
- 1.2 MGD
- NPDES permit
- CA0047856
- Expired
- Permit expires
- July 2025
- Population served
- —
- CWNS 2022
California Mens Colony is a publicly owned wastewater treatment plant in San Luis Obispo, San Luis Obispo County, California treating an average of 0.76 million gallons per day against a permitted design capacity of 1.2 MGD. It discharges under NPDES permit CA0047856 (expired), which expires in July 2025, with 125 recorded violations in the last three years. EPA has recorded 3 formal enforcement actions naming the plant, the latest in September 2023.
Treatment technology
One treatment structure or unit process identified at California Mens Colony.
Available with a free Klarifi account
See the full treatment train at California Mens Colony: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 125
- Effluent violations
- 47
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 California Mens Colony in EPA's ICIS system.
- Formal actions
- 3
- 1 since FY2020
- Compliance actions
- $29M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Sep 2023
California Men's Colony Administrative Order on Consent
Administrative order · CWA, NPDES Discharge without a Permit · Final Order No Penalty · Compliance actions $15M
EPA's description of the case:
“This is an Administrative Order on Consent with the California Department of Corrections and Rehabilitation (CDCR) and the California Men's Colony (CMC) to address violations of Clean Water Act NPDES…”
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Source: EPA ECHO, civil enforcement case 09-2023-1505.
Full case history with a free Klarifi account
Every action against California Mens Colony with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in San Luis Obispo
San Luis Obispo's capital improvement plan lists 115 water, sewer and wastewater line items worth $170M starting 2025–2034. The largest budgeted items are shown here.
All water and sewer capital projects in San Luis Obispo →
| Project | Budget | Years |
|---|---|---|
| Water - Pipeline Replacement | $36,980,000 | 2030–2035 |
| Sewer - Pipeline Replacement | $23,148,000 | 2030–2035 |
| Water - Major Maintenance | $22,236,000 | 2030–2035 |
| T-3 Water Storage Tank Replacement - High Pressure Zone | $9,750,000 | 2026–2030 |
| Waterline Replacement: Santa Rosa - Stenner Creek Road to Highland 30-inch | $9,230,000 | 2027–2028 |
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
7 verified contacts for California Mens Colony, with validated emails and direct phone numbers.
Unlock 7 verified contacts (4 more than shown)
Names, validated emails and direct phone numbers for decision-makers at California Mens Colony, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in California
San Luis Obispo · 5 mi away
5.6 MGD
Morro Bay · 8 mi away
—
Avila Beach · 10 mi away
0.07 MGD
Morro Bay · 12 mi away
0.26 MGD
Pismo Beach · 13 mi away
1.01 MGD
Oceano · 16 mi away
2.25 MGD
Paso Robles · 23 mi away
2.54 MGD
Paso Robles · 30 mi away
—
California Mens Colony: 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 · FOG · Equalization tank · all terms