California has more than 7,000 public water systems regulated by the State Water Resources Control Board (SWRCB) Division of Drinking Water alongside federal EPA requirements. Compliance in 2026 is more demanding than ever — federal PFAS monitoring obligations are phasing in, LCRI requires active service line inventories (November 1, 2027 compliance date), and annual Consumer Confidence Report filings have no deadline flexibility.

PFAS — Initial Monitoring by 2027

The EPA sets limits of 4 ppt for PFOA and PFOS. California community water systems must complete initial monitoring within 3 years of the rule. A violation triggers public notification and corrective action. California DDW may impose additional requirements beyond the federal baseline.

See exactly what your system is up against

Search by system name or PWSID and get your EPA violation history, open requirements, and upcoming deadlines in under a minute. Free, no account, no obligation.

Lead and Copper Rule Improvements (LCRI)

The LCRI compliance date is November 1, 2027. California systems must complete a full lead service line inventory and submit it to the State DDW. The inventory classifies every service line as lead, galvanized requiring replacement, non-lead, or unknown. California's SB 1398 (Health & Safety Code §116885) set state lead service line inventory and replacement planning requirements ahead of the federal rules.

Consumer Confidence Report (CCR)

Community water systems must deliver a CCR to every customer by July 1 each year. Missing the deadline is a direct compliance violation. The report must include all detected contaminants, source water information, and educational language on lead.

How Orevant Maps Your California Obligations

Orevant reads your SDWIS record and maps every applicable federal and California state requirement onto a prioritized compliance roadmap. Every finding links to the actual regulation.

Check My California Water System — Free at orevant.com

City by city compliance in California

Public water systems in California face the same federal deadlines city by city. Guides for the largest cities:

All city guides

FAQ

Does Orevant cover California DDW rules, not just EPA?

Yes. California-specific requirements including the CCCPH cross-connection program and state reporting obligations are included alongside all applicable federal EPA standards.

How current is the data?

Search uses a local SDWIS mirror, re-synced monthly. Live records are pulled at scan time. Federal databases can trail state files by a quarter or more; reports disclose that lag.

What if my system is under 500 connections?

Orevant is built for small and mid-size systems — including systems with a few hundred connections and one or two people wearing every hat.