Home Health Inspections LLC

📞 Service Area Statement:

We proudly serve clients throughout Skagit, Snohomish, Whatcom, Island, and San Juan Counties — and will travel anywhere within Washington State as needed.

*Additional travel fees may apply for inspections outside our primary service region.

Microscopic Water Testing

Microscopic Water Testing – A Homeowner’s Guide to Detecting Parasites in Drinking Water

What is Microscopic Water Testing?

Microscopic water testing is the process of examining drinking water for tiny organisms like parasites, bacteria, and protozoa that can’t be seen with the naked eye.

  • Even clear, clean-looking water can contain harmful microbes.
  • Parasites are invisible to the eye but can survive in both private wells and municipal water supplies.
  • Some parasites can cause serious illness, especially in children, the elderly, or people with weakened immune systems.

This type of testing goes beyond standard water quality checks for chemicals and minerals, focusing instead on living contaminants.

Where Do Water Parasites Come From?

Parasites can enter drinking water through many sources, often linked to sanitation or environmental contamination. Common sources include:

  • Private wells contaminated by septic systems or agricultural runoff.
  • Surface water (lakes, rivers, ponds) that seeps into groundwater.
  • Flooding or heavy rain that carries sewage or animal waste into water supplies.
  • Aging infrastructure in municipal systems that allows contamination to enter pipes.

Because parasites are microscopic, you won’t see them, smell them, or taste them in your water.

Common Parasites Found in Drinking Water

Some of the most concerning microscopic organisms that testing looks for include:

  • Giardia: a parasite that causes giardiasis, leading to diarrhea, cramps, nausea, and dehydration.
  • Cryptosporidium (“Crypto”): resistant to chlorine treatment, this parasite can cause severe gastrointestinal illness.
  • Amoebas: some species can cause rare but serious infections.
  • Other protozoa and microorganisms: can create stomach upset, long-term digestive issues, and health complications in vulnerable individuals.

Even small exposures can cause illness, especially in children and those with weakened immune systems.

Why are Water Parasites Dangerous?

  • Short-term effects: diarrhea, stomach cramps, nausea, vomiting, fever, and dehydration.
  • Long-term effects: some infections can last weeks or months, leading to malnutrition or chronic health issues.
  • Vulnerable groups: infants, older adults, and immunocompromised individuals are at greatest risk for serious complications.

Unlike chemical contaminants, parasites are living organisms that can multiply inside the body after ingestion.

Why Should Homeowners Care About Microscopic Water Testing?

  • Standard water tests don’t always detect parasites. Testing for nitrates, pH, or heavy metals won’t reveal living microorganisms.
  • Private wells are especially vulnerable, since they are not regulated like municipal water supplies.
  • Seasonal risks exist: heavy rains, flooding, or agricultural activity can increase contamination risk.
  • Health protection: knowing your water is parasite-free gives peace of mind for your entire family.

What if Parasites are Found in My Water?

If microscopic testing detects parasites, there are several solutions to make your water safe:

  • Disinfection methods: ultraviolet (UV) purification, boiling, or chemical treatment can kill parasites.
  • Filtration systems: high-quality filters rated to remove protozoa and microorganisms.
  • Well maintenance: sealing cracks, maintaining septic systems, and protecting wellheads from runoff.
  • Professional remediation: water treatment specialists can recommend long-term solutions tailored to your system.

Tips for Preventing Parasite Contamination

  • Test well water at least once a year for bacteria and parasites.
  • After flooding, always retest your water before using it for drinking or cooking.
  • Ensure septic systems are properly maintained and not leaking into groundwater.
  • Use certified filters or purification systems if your area has a history of waterborne parasite outbreaks.
  • Always boil water during public health advisories or boil-water alerts.

The Bottom Line

Microscopic parasites are an invisible but serious threat to household water safety.

  • They can’t be seen, smelled, or tasted — only testing can confirm their presence.
  • Illness can be severe and long-lasting, especially for vulnerable individuals.
  • Prevention is possible: with proper testing, treatment, and maintenance, your home’s water supply can be kept safe and healthy.

A Home Health Inspection that includes microscopic water testing ensures your drinking water is free of harmful parasites and provides confidence that your family’s water is truly clean.