Olathe Harold (main Plant)
Olathe, KS · Johnson County · Publicly Owned Treatment Works
- Average flow
- 1.3 MGD
- Design flow
- —
- NPDES permit
- KS0045802
- Effective
- Permit expires
- June 2028
- Population served
- 32,213
- CWNS 2022
Olathe Harold (main Plant) is a publicly owned wastewater treatment plant in Olathe, Johnson County, Kansas treating an average of 1.3 million gallons per day, serving about 32,213 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit KS0045802 (effective), which expires in June 2028, with 5 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
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.
Capital improvement projects in Olathe
Olathe's capital improvement plan lists 31 water, sewer and wastewater line items worth $262M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Olathe →
| Project | Budget | Years |
|---|---|---|
| West Cedar Creek Sewer Interceptor | $38,633,400 | 2025–2026 |
| Cedar Creek WWTP Expansion Phase II (BNR) | $35,136,700 | 2025–2027 |
| Cedar Creek WWTP Solids Handling Expansion | $34,920,000 | 2025–2027 |
| Waterline Rehabilitation | $30,780,000 | 2025–2029 |
| Neighborhood Sanitary Sewer Improvements | $16,868,240 | 2025–2029 |
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
Decision-makers at Olathe Harold (main Plant).
No verified contacts on file yet
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Nearby wastewater treatment plants in Kansas
Olathe · 4 mi away
3.74 MGD
Overland Park · 7 mi away
10.2 MGD
Gardner · 9 mi away
1.83 MGD
Shawnee · 10 mi away
9.47 MGD
Leawood · 11 mi away
12.13 MGD
Spring Hill · 11 mi away
—
Kansas City · 11 mi away
2.64 MGD
Stanley · 11 mi away
5.14 MGD
Olathe Harold (main Plant): 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 March 30, 2025.