CCR 2027 Deadline Calendar: Key Dates for the Revised Rule
By Andy Zhang — last reviewed April 18, 2026.
If you operate a community water system, the revised Consumer Confidence Report (CCR) Rule (40 CFR Part 141 Subpart O, as amended by the May 24, 2024 Federal Register final rule at 89 FR 46008) has turned what used to be a single annual date on the compliance calendar into a layered, rolling set of obligations. Per 40 CFR §141.152(a), the federal compliance clock starts January 1, 2027; the first 2027-compliant report lands on customers' doorsteps or inboxes by July 1, 2027; a second statutory compliance date applies beginning November 1, 2027 (for the July 1, 2025-codified text); and — for systems serving 10,000 or more people — a second CCR delivery is due by December 31 of each year. Miss any of those dates and you are exposed to primacy-agency enforcement, EPA referral under SDWA §1414, and, increasingly, to the kind of public-records scrutiny that travels fast on local news and social channels.
This page is the operator-facing deadline calendar. It gives you every date that matters between now and 2028, a downloadable ICS file you can import into the utility's compliance calendar system, a plain-language explanation of what each deadline obligates you to do, and a planning framework that works backward from July 1, 2027. For the broader regulatory context, pair this page with the revised CCR rule 2027 summary and the full requirements matrix.
The dates that matter
The table below is the minimum calendar every operator should have loaded into whatever system you use to track regulatory deadlines. It covers only the federal floor — your state primacy agency may add earlier submission dates, earlier public-notice obligations, or expanded biannual scope, and those state dates stack on top of the federal ones.
| Date | Milestone | Applies to | Source |
|---|---|---|---|
| Sep 2026 onward | Recommended content-drafting window for 2027 readiness | All CWSs | Planning guidance |
| Mid-2026 – Q1 2027 | State primacy agencies finalize implementation text | All CWSs (via primacy) | 40 CFR 142.12 |
| Jan 1, 2027 | Primary compliance date: systems must comply with §§141.151–141.156 (as codified July 1, 2024) | All community water systems | 40 CFR §141.152(a) |
| Apr 1, 2027 | Wholesale (seller) systems must deliver §141.153 data to buyer systems (annual, thereafter) | Wholesale CWSs | 40 CFR §141.152(d)(1) |
| Jul 1, 2027 | First 2027-compliant CCR due (covering calendar year 2026 data) | All community water systems | 40 CFR §141.152(b), §141.155 |
| Oct 1, 2027 | Wholesale systems selling to biannually-reporting buyers must deliver biannual-update data | Wholesale CWSs feeding ≥10,000-person buyers | 40 CFR §141.152(d)(3) |
| Nov 1, 2027 | Second statutory compliance milestone: systems must comply with §§141.151–141.156 (as codified July 1, 2025) | All community water systems | 40 CFR §141.152(a) |
| Dec 31, 2027 (and each Dec 31 after) | Second-half ("biannual") report due | Systems serving 10,000 or more persons | 40 CFR §141.155(j)(2) |
| Jul 1 (annual, ongoing) | Annual CCR delivery deadline | All community water systems | 40 CFR §141.152(b), §141.155(j)(1) |
Five things are worth noticing in that table. First, the federal compliance date (January 1, 2027) and the first report delivery deadline (July 1, 2027) are six months apart — that gap is deliberate, because it gives you a full calendar year of monitoring data (2026) to summarize in the first report prepared under the new format. Second, the biannual obligation is codified at §141.155(j)(2) (not §141.153 as some early summaries suggested) and applies to community water systems serving 10,000 or more persons — exactly 10,000 triggers the requirement, not only systems above 10,000. Third, the second biannual delivery is due by December 31, not the following January 1; some states may set an earlier in-state date. Fourth, §141.152(a) actually establishes two federal compliance milestones — January 1, 2027 and November 1, 2027 — because the May 2024 and October 2024 rule revisions were codified on different July-1 snapshots of the CFR. Fifth, the primacy-agency window — the period during which your state is finalizing its adopted text — overlaps the effective date, which means some of the procedural detail you are drafting against in late 2026 will still be in flux.
Download the calendar (ICS)
The iCalendar (.ics) format is the universal calendar-exchange standard specified in RFC 5545. Any mainstream calendar application — Outlook, Google Calendar, Apple Calendar, Fastmail, ProtonMail, as well as most compliance-management platforms — can import an ICS file and add the events as reminders, either as one-off entries or, in the case of the biannual obligation, as a recurring series.
Download ccr-2027-calendar.ics and import it into the calendar you use to track regulatory deadlines. The file contains the core federal events: the January 1, 2027 compliance date, the July 1, 2027 first-compliant-report deadline, the November 1, 2027 second compliance milestone, and the December 31 biannual second-half distribution for systems serving 10,000 or more persons (set to recur yearly). If you are using a compliance-management platform that ingests ICS — several of the tools reviewed in our CCR software guide do — you can subscribe to the file URL directly and let the platform track updates if we revise it as primacy agencies finalize their texts.
If your utility uses a shared Outlook or Google Workspace calendar for compliance, import the ICS into that calendar rather than a personal one. The operator who handles the 2027 report may not be the operator who was around when the calendar was first imported in 2026, and a shared calendar is the least fragile way to carry the obligation across staff changes.
What each deadline means for operators
January 1, 2027 — primary compliance date (§141.152(a)). This is the day revised-rule processes must be operational. It does not mean you must have delivered a 2027-format report — that is the July 1 date. It means your template revisions, your electronic-delivery infrastructure, your direct-URL landing page, your readability edits, your translation workflow, and your bounce-tracking procedures must all be in place and exercised at least once in a dry run. If you arrive at January 1 still negotiating your translation vendor contract or still debugging URL persistence on the e-delivery landing page, you are already behind.
April 1, 2027 — wholesaler data handoff (§141.152(d)(1)). Community water systems that sell water to another CWS must deliver the §141.153 applicable information to the buyer system by April 1, 2027 and annually thereafter — unless seller and buyer have a contract specifying an alternative date. If you are a wholesaler (or a retail system that pulls water from one), this date anchors the reconciliation timeline for the July 1 report.
July 1, 2027 — first compliant report (§141.152(b), §141.155). This is the hard delivery deadline for the first CCR prepared under the revised rule. The report covers monitoring data from calendar year 2026 and must reach every customer account by that date. Delivery methods permitted under the revised rule are enumerated in 40 CFR §141.155, and some states continue to allow bill-insert paper delivery through a transition window. For the mechanics of composing the report itself, see how to write a CCR and the task-by-task 2027 checklist.
October 1, 2027 — wholesaler biannual handoff (§141.152(d)(3)). Wholesalers that sell to a buyer system serving 10,000 or more persons (which triggers the biannual obligation) must deliver the §141.155(j) biannual-update data to the buyer by October 1, 2027 and annually thereafter. This is the only wholesaler-to-retailer deadline that feeds the December 31 biannual delivery.
November 1, 2027 — second compliance milestone (§141.152(a)). The May 2024 and October 2024 Federal Register revisions were codified on different July-1 CFR snapshots. Systems must comply with the §§141.151–141.156 text as codified on July 1, 2025 beginning November 1, 2027. Practically, if your template and processes are built against the most-current eCFR text, you are covered; this is a milestone to flag if you froze your template design against a pre-July-2025 snapshot.
Annual July 1 deadline (ongoing, §141.155(j)(1)). This date does not change after 2027. Every subsequent year, the annual CCR for the prior calendar year's monitoring data is due to customers by July 1. The annual obligation applies to every community water system regardless of size.
Biannual delivery by December 31 (ongoing, ≥ 10,000 persons, §141.155(j)(2)). Starting in 2027, community water systems serving 10,000 or more persons must distribute CCR content twice per calendar year, with the second delivery due by December 31. (The regulatory text is explicit on both the threshold — "10,000 or more persons" — and the date — "by December 31.") The July 1 delivery is the full annual report. The second delivery is narrower: if the system had a violation, action-level exceedance, or UCMR result between January 1 and June 30, the 6-month update content required by §141.155(j)(3) attaches. The second delivery must be a distinct delivery event; a link to the July report does not satisfy the biannual obligation. For the operational mechanics, see our twice-yearly distribution guide.
Limited-English-proficiency plan (§141.155(i)). Systems serving 100,000 or more persons must submit, with their first 2027 report, a plan for providing assistance to consumers with limited English proficiency; the plan must be evaluated annually thereafter and reported with the delivery certification. If you are above that 100,000 threshold, budget LEP-plan drafting into the same September-2026-onward drafting window as the report itself.
September 2026 onward — drafting window. This is guidance, not a regulatory deadline, but it is the milestone that most often gets skipped. Utilities that wait until Q1 2027 to begin drafting their first 2027-compliant report almost invariably ship a report that is stylistically compliant but editorially weak: the plain-language summary reads like a data table, the glossary is copy-pasted from another utility, and the violation narrative is still buried. Start drafting in September 2026. Circulate drafts internally in October and November. Have the near-final template ready for primacy-agency preview by early 2027.
Penalties and enforcement for missed deadlines
CCR deadline enforcement runs through two overlapping authorities. At the state level, primacy agencies enforce under the authority EPA granted them pursuant to 40 CFR Part 142. Typical primacy-agency actions for a missed annual CCR deadline progress from a notice of non-compliance, to a formal administrative order, to a monetary penalty that in most states ranges from a few hundred dollars per day of non-compliance at the bottom of the schedule to tens of thousands of dollars for willful or repeated violations. Primacy agencies also have the authority to require public notification — a separate, more visible obligation than the CCR itself — if they determine that the missed CCR rises to a level warranting Tier 3 public notice.
At the federal level, EPA retains enforcement authority under Safe Drinking Water Act sections 1414 and 1431 (see EPA's SDWA enforcement overview). SDWA §1414 permits administrative orders and civil penalties, with per-violation maxima adjusted annually for inflation under the Federal Civil Penalties Inflation Adjustment Act. Per 40 CFR §19.4 (2026 adjustment), the ceiling for SDWA §300g-3(b) administrative actions against a public water system is $71,545 per day per violation; the ceiling for §300g-3(g)(3)(C) public-notification violations is $49,848 per day. §1431 authorizes emergency orders where a violation may present an imminent and substantial endangerment. EPA referrals are uncommon for first-time CCR delivery misses, but they are not rare for repeat offenders or for systems whose CCR misses coincide with underlying monitoring or reporting failures. For the full enforcement picture, our CCR enforcement and penalties page lays out the escalation ladder in more detail.
The softer but often more consequential penalty is reputational. Missed CCR deadlines are public records in every primacy state, and local newsrooms, watchdog groups, and — increasingly — opposing political campaigns mine the primacy-agency databases for exactly this kind of lapse. A missed delivery discovered by a reporter is far more expensive than a missed delivery discovered by the primacy inspector.
Planning backward from July 1, 2027
Working forward from today almost always produces a schedule that misses the deadline. Work backward instead. Here is a 30-60-90 day plan anchored on July 1, 2027.
T-90 days (approximately April 1, 2027): Draft complete. The full 2027-format CCR — plain-language summary, data tables, glossary, violation narrative, translation content, and summary section — should be through internal review and ready for primacy-agency review. Technical monitoring data for calendar year 2026 is fully reconciled by this point; if you are still chasing lab data in April, pull in the laboratory project manager immediately.
T-60 days (approximately May 1, 2027): Primacy-agency review complete and print vendor ready. Primacy-agency review in most states is a 10-to-30 business-day process depending on the state's CCR review queue. If you submit in April, you typically have comments back by early May. Print vendor contracts should be signed and the print specification approved. For electronic-delivery systems, the direct-URL landing page should be live on a staging environment with a known-good URL scheme.
T-30 days (approximately June 1, 2027): Delivery QA and final sign-off. Final proof approved, print run committed or scheduled, e-delivery send list reconciled against the customer database, translated content posted at the language-specific URLs, paper-copy-on-request workflow tested with a live test request, and bounce-handling procedures documented. An operator or compliance lead signs off on the final release to delivery.
T-0 (July 1, 2027): Delivery complete and documented. Confirmation of delivery recorded. Certification of distribution (the primacy-agency form that attests to completion) filed within the window your state requires — commonly 10 business days after July 1.
A utility running this backward plan starts the critical drafting work in September 2026, pulls the data reconciliation forward into March, and treats April as a review buffer rather than a scramble month. That is the only pacing that reliably produces a clean July 1 delivery.
Special timing for small systems
Small systems — community water systems serving fewer than 10,000 persons — are not subject to the biannual distribution requirement (§141.155(j)(2) applies at "10,000 or more persons", so a system serving exactly 10,000 falls inside the biannual requirement, not outside it). Their CCR obligation under the revised rule remains annual: one delivery per year, due by July 1, covering the prior calendar year's monitoring data. That is a meaningful relief on the delivery-cadence side, but the other revised-rule sub-requirements (direct-URL e-delivery, readability, and translation) still apply in full.
The practical implication is that small-system operators should budget implementation hours for template and process changes, not for doubled delivery frequency. The readability rework and the translation workflow — particularly for systems with non-English-speaking populations above the primacy-agency threshold — represent the bulk of the implementation cost for small systems. For a detailed walk-through of the compliance path tailored to smaller utilities, see our small water system CCR compliance guide and the pricing discussion in the CCR software pricing overview. Additional operational context for small-utility staffing patterns lives in the utilities section.
FAQ
Is the rule compliance date the same as the first report deadline?
No. Per 40 CFR §141.152(a), the primary compliance date is January 1, 2027 — the day your revised-rule processes must be operational. The first compliant report delivery deadline is July 1, 2027 (§141.152(b), §141.155) — the day the first CCR prepared under the revised rule must reach customers. The six-month gap is intentional, because the first 2027-format report summarizes calendar year 2026 monitoring data, which is not fully reconciled until early 2027. Treat them as two separate deadlines on the calendar. §141.152(a) also establishes a November 1, 2027 secondary compliance milestone tied to the July-1-2025 codification of the subpart; for most systems this is operationally invisible if you are building against the current eCFR text.
Do small utilities have to file twice yearly?
No. Under 40 CFR §141.155(j)(2), the biannual distribution requirement applies only to community water systems serving 10,000 or more persons, measured against the service-population figure reported in EPA's Safe Drinking Water Information System (SDWIS). Systems serving fewer than 10,000 continue on the single-annual-delivery cadence with the same July 1 deadline as before. A system serving exactly 10,000 is inside the biannual requirement — the threshold is inclusive. Confirm your current SDWIS population figure with your primacy agency if you are anywhere near the threshold, because systems that cross the 10,000 line between SDWIS refreshes are the group most often surprised by the biannual obligation.
What if my state moves the deadline?
State primacy agencies can adopt rules more stringent than the federal floor but cannot push the federal deadlines later. In practice that means a state may require an earlier primacy-agency submission date, an earlier public-notice date, or an earlier delivery date — but no state can authorize an annual CCR delivery later than July 1, or a biannual second delivery later than December 31. If your primacy agency has published an adopted-rule text with different dates, the earlier date governs. Check your primacy agency's CCR implementation page in Q4 2026 for the final adopted text, and update the imported ICS entries accordingly if state-specific dates apply to you.
When should I start drafting my 2027 CCR?
September 2026. That gives you four months of drafting and internal review before the January 1, 2027 compliance date, three additional months to reconcile 2026 monitoring data into the draft, and a full review buffer in April and May 2027. Utilities that start drafting in Q1 2027 almost always ship a template that is formally compliant but substantively weak, because the plain-language summary and glossary elements of the revised rule take multiple review cycles to get right. Earlier drafting is also the lowest-cost way to integrate primacy-agency feedback, because you can incorporate state-specific changes during your regular review cycle rather than in a rushed final pass.
How is compliance verified?
Two-channel verification. First, the utility files a certification of distribution with the primacy agency — the form and the filing window vary by state, but the content is consistent: the date the CCR was delivered, the delivery method or methods used, the count of customer accounts served, and an officer's attestation that the distribution complied with 40 CFR Part 141 Subpart O. Second, the primacy agency verifies independently through a combination of random audit, scheduled sanitary survey, and complaint-driven review. Primacy inspectors routinely request the CCR itself, the delivery records (mail tracking, email send logs, bounce records, paper-copy-on-request fulfillment records), and the direct-URL landing page archive as part of the compliance file. Keep those records for at least three years — EPA's recordkeeping baseline under 40 CFR §141.33 — and longer if your primacy agency imposes a longer retention.
Sources
- 40 CFR Part 141 Subpart O — Consumer Confidence Reports (eCFR current). https://www.ecfr.gov/current/title-40/chapter-I/subchapter-D/part-141/subpart-O — accessed 2026-04-18.
- 40 CFR §141.152 — Compliance dates (eCFR current). https://www.ecfr.gov/current/title-40/chapter-I/subchapter-D/part-141/subpart-O/section-141.152 — accessed 2026-04-18.
- 40 CFR §141.155 — Report delivery, reporting, and recordkeeping (eCFR current). https://www.ecfr.gov/current/title-40/chapter-I/subchapter-D/part-141/subpart-O/section-141.155 — accessed 2026-04-18.
- Federal Register, "National Primary Drinking Water Regulations: Consumer Confidence Reports," 89 FR 46008, May 24, 2024. https://www.federalregister.gov/documents/2024/05/24/2024-10919/national-primary-drinking-water-regulations-consumer-confidence-reports — accessed 2026-04-18.
- EPA, Safe Drinking Water Act: Consumer Confidence Reports (portal). https://www.epa.gov/ccr — accessed 2026-04-18.
- EPA, Safe Drinking Water Act and Federal Facilities (SDWA enforcement overview, §§1414, 1431, 1447; civil penalty inflation). https://www.epa.gov/enforcement/safe-drinking-water-act-and-federal-facilities — accessed 2026-04-18.
- 40 CFR Part 19 §19.4 Table 1 — Civil Monetary Penalty Inflation Adjustments. https://www.ecfr.gov/current/title-40/chapter-I/subchapter-A/part-19 — accessed 2026-04-18.