Contaminant family guide

Inorganics and Nitrates in Tap Water

Inorganic contaminants include minerals, salts, and nutrient compounds whose sources and health significance differ by analyte.

3 compound guides3 with a federal MCL4 treatment methods named

What are inorganics and nitrates?

A family label, not a compound

These substances can occur naturally or enter water through agriculture, industry, treatment, and infrastructure. The family spans compounds with very different behavior.

Each analyte has its own measurement basis and reference value. Family-level summaries must not be read as a single safety threshold.

Sources named in the compound records
  • Agricultural fertilizer
  • Animal feedlots and manure
  • Septic systems
  • Natural mineral deposits
  • Community water fluoridation
  • Animal waste
Published compound guides

Three inorganics with federal limits

Each has its own limit.

How to read a local result

Four checks before you act

  1. STEP 1Identify the named analyte

    A family name may contain compounds with different standards and health contexts.

  2. STEP 2Keep the measurement attached

    Read the value with its unit, qualifier, sampling period, reporting limit and source.

  3. STEP 3Compare only with the stated reference

    PurityMap does not turn unlike compound results into a family score or safety verdict.

  4. STEP 4Verify the treatment claim

    The product certification must name the compound or reduction claim.