---
title: Hydrotech Discfilter | Meeting Phosphorus Limits
description: Discover how the City of Medford upgraded its sand filtration system to meet strict phosphorus limits by retrofitting advanced technology while maximising existing infrastructure.
---

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Case Study

# HYDROTECH DISCFILTER: ULTRA LOW PERFORMANCE

### Maximising existing infrastructure, minimising new construction

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![Screenshot 2026-01-06 15.03.52](https://info.veoliawatertechnologies.ie/hs-fs/hubfs/Screenshot%202026-01-06%2015.03.52.png?width=416&height=304&name=Screenshot%202026-01-06%2015.03.52.png)

### In this Case Study

Learn how the City of Medford, Wisconsin upgraded its aging 1980s-era sand filtration system to meet stringent future phosphorus discharge limits of \<0.075 mg/L by 2024.

Gain insights into:

- How to retrofit advanced filtration technology into existing infrastructure
- How to build flexibility into wastewater treatment systems
- The full process description

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