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Download Excel NPDES Self Monitoring Program
City of Willows and Eco Resources, Inc. Willows, WWTP
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Organization
City of Willowsshow partners
Program website
view
Plan contactGreg Tyhurst
(530) 934-7041
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| Start date | 01/26/2006 |
| End date | None |
| Objectives | The City of Willows (hereinafter Discharger) is currently discharging pursuant to Order No. R5-2006-0009 and National Pollutant Discharge Elimination System (NPDES) Permit No. CA0078034. The Discharger submitted a Report of Waste Discharge, dated 1 July 2010, and applied for a NPDES permit renewal to discharge up to 1.2 million gallons daily of treated wastewater from Willows Wastewater Treatment Plant, hereinafter Facility. The application was deemed complete on 27 July 2010.
The Discharger owns a Publicly Owned Treatment Works (POTW). SouthWest Water Company (contract operator) operates the wastewater treatment plant. The treatment system at the facility consists of a wastewater collection, treatment, and disposal system and provides sewage service to the City of Willows. The treatment system includes influent screening, extended aeration (biolac system), activated sludge with two secondary clarifiers, nine continuous backwash sand filters, disinfection with sodium hypochlorite, dechlorination using sodium bisulfite injection, equalization and emergency storage ponds, and sludge storage lagoons. |
| Annual budget | None |
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Basins & sub-basins monitored
- Sacramento River (Sacramento River)
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map
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Sites Monitored
| Name |
Code |
Latitude |
Longitude |
Map |
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Agricultural Drain C, 1500 feet upstream from point of discharge
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RSW-001 |
39.495456 |
-122.194655 |
locate |
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Agricultural Drain C, 100 feet downstream from point of discharge
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RSW-002 |
39.492235 |
-122.189014 |
locate |
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GCID Lateral 26-2, 100 feet upstream from point of discharge
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RSW-003 |
39.502245 |
-122.192554 |
locate |
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GCID Lateral 26-2, 100 feet downstream from point of discharge
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RSW-004 |
39.501429 |
-122.192211 |
locate |
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Parameters Monitored
| Group | Parameters | Frequency |
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| Disinfection Byproducts |
Trihalomethanes |
Annual, Monthly |
| General Water Quality |
Dissolved Oxygen (DO), Electrical Conductivity (EC) , Hardness, pH, Specific Conductance [EC @ 25 deg C], Temperature, Turbidity |
Bimonthly, Biweekly, Monthly |
| Nutrients |
Ammonia NH3, Nitrate as N NO3-N |
Monthly |
| Pathogens & Bacteria |
Fecal Coliforms |
Quarterly |
| Priority Pollutants |
, Priority Pollutants |
Annual, Monthly |
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Data Products Available
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