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Gentle on older plumbing, thorough with your water (650) 300-3248
Daly City Water Filtration
Rows of water sample bottles in a rack

Water Testing & Analysis

Water Testing & Analysis in Daly City

Water checks for homes across Daly City, with lab testing for older plumbing.

Testing the water and the house

Water testing and analysis in Daly City means looking at two things: the water that arrives and the pipes it travels through. The city's annual report covers the supply. Your tap adds your own service line, pipes and fixtures, which in many homes here are several decades old.

An on-site visit measures chloramine, hardness, TDS, pH and iron in about forty minutes, and we look at the incoming line while we are there. For older homes, we arrange a certified lab test for lead. For private supplies, bacteria and nitrate testing.

Every result is written down and explained in plain language. If everything looks fine, that is what we tell you.

Good times to test

Moving into an older home, noticing rusty or discolored water, worrying about lead in pre-1986 plumbing, before buying any filtration system, or once a year if you have a private supply.

If you are buying a home, a check during the inspection period tells you how the plumbing and any existing equipment are holding up.

A test at your kitchen tap tells us what the water is like after it has travelled through your own pipes, which is what you actually drink. If you want to compare that with the water entering the house, we can sample at the hose bib nearest the meter as well. A big difference between the two usually points to the plumbing rather than the supply, and that changes what the sensible next step is.

What we check

On site and through certified labs.

  • Chloramine

    Free and total chlorine.

  • Hardness

    Usually low in Daly City.

  • Total dissolved solids

    A broad baseline.

  • pH

    Affects corrosion of older pipes.

  • Iron

    Often from galvanized lines.

  • Lead (lab)

    Recommended for older plumbing.

  • Bacteria and nitrate (lab)

    For private supplies.

  • Written results

    Every number explained.

How the visit goes

  1. We sample

    At the kitchen tap, and we look at the main line.

  2. We explain

    Results at your table, lab results when they return.

  3. We suggest, or not

    A fix is priced only if one makes sense.

Questions people ask

How is lead tested?

A first-draw sample sent to a certified lab. We explain how to collect it.

Is a home kit enough?

For a rough idea. For lead or bacteria, use a lab.

How long do lab results take?

Usually several business days.

Should I test before buying a home?

It is a good idea, especially in an older house. We can usually fit a visit inside an inspection period.

Why neighbors test with us

  • Water and pipes

    We look at both.

  • Plain explanations

    No jargon, no pressure.

  • Your results

    Kept, whatever you decide.

  • Water and pipes checked first
  • One written price
  • Certified equipment
  • Two-hour visit windows

Find out what is going on with your water

A check at your tap and a look at your pipes is the best place to start.