Required Limits

National Primary Drinking Water - List of Contaminants and MCL

• Source: https://www.epa.gov/ground-water-and-drinking-water/national-primary-drinking-water-regulations

Soluble Threshold Limit Concentration (STLC) and Total Threshold Limit Concentration (TTLC) Regulatory Limits

• Source: California Code of Regulations, Title 22, Chapter 11, Article 3.

Maximum Concentration of Contaminants for the Toxicity Characteristic

• Source: 40 CFR §261.24