Manganese Water Test Results Guide

What this test measures

This test measures manganese — a natural metal that shows up as black or dark-brown specks and staining, a bitter metallic taste, and marks on laundry. It’s particularly common in borehole and well supplies.

The UK standard

UK drinking water regulations set 50 µg/l for manganese. Even below that, you can sometimes see staining in kettles and toilet cisterns — it’s a low threshold because it’s so visible.

Reading your strip

Dip a strip into your sample for two seconds, hold it level and wait 30 seconds. Match the manganese pad against the colour chart on your instructions card and read off the closest band. Strips give you a clear range rather than a lab-precise number — exactly what you need for spotting problems and tracking changes over time.

What to do next

• Confirm it first. One strip is a snapshot — re-test with a fresh strip and a fresh sample before acting on a result.
• If a reading on a mains supply stays above the standard after re-testing, contact your water supplier — they investigate quality concerns free of charge.
• On a private supply (well, borehole or spring), your local council’s environmental health team can arrange accredited lab testing. Manganese filters are a routine fix for private supplies.
• Thinking about a filter? Test before and after fitting it so you can see exactly what it changed.