CCR Twice-Yearly Distribution: Who Has to, Why, and How

By Andy Zhang — last reviewed April 18, 2026.

Community water systems serving 10,000 or more people now have a second Consumer Confidence Report (CCR) delivery deadline each year. The 1998 CCR Rule required one report annually, delivered by July 1 and covering the prior calendar year. The revised CCR Rule, finalized by EPA at 89 FR 45980 (docket EPA-HQ-OW-2022-0260, May 24, 2024), codifies the twice-per-year obligation at 40 CFR 141.155(i)–(j). Beginning with reports covering calendar year 2026, every community water system serving a population of 10,000 or more must deliver its CCR twice during each calendar year.

That second delivery is the operational surprise lurking inside the 2027 compliance date. Most utilities have spent the last eighteen months on template rework and e-delivery mechanics; the biannual requirement is less technically demanding but more operationally disruptive because it introduces a second production-and-distribution cycle into a workflow that has run once a year for twenty-eight years. This guide walks through who the rule applies to, what the second distribution must contain, how the two delivery windows interact, why EPA added the requirement, and how to integrate the second cycle into existing utility communications.

Annual vs biannual at a glance

Dimension	Systems serving fewer than 10,000	Systems serving 10,000 or more
Applicable subsection	40 CFR 141.155(a)–(h)	40 CFR 141.155(i)–(j)
First delivery deadline	July 1 (covers prior calendar year)	July 1 (covers prior calendar year)
Second delivery deadline	None	December 31 of same calendar year, per §141.155(j)(2)
Second-delivery content	N/A	Mid-cycle update: new monitoring data, violations since July 1, and material changes
Wholesaler handoff (seller → buyer)	§141.152(d)(1): April 1, 2027, and annually thereafter	§141.152(d)(3): October 1, 2027, and annually thereafter
First compliance year	CY 2026 data, delivered 2027	CY 2026 data, delivered 2027 (both cycles)

Who this applies to

The biannual distribution requirement at 40 CFR 141.155(i) applies to community water systems serving a population of 10,000 or more. The threshold is inclusive: a system serving exactly 10,000 people is in scope. "Community water system" remains the Safe Drinking Water Act definition: a public water system that serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents. Non-transient non-community systems (schools with their own wells, workplaces) and transient non-community systems (campgrounds, rest stops) are not subject to the CCR Rule and therefore not subject to biannual distribution.

The 10,000-person threshold is a service-population count, not a connection count and not a billing-account count. Primacy agencies generally use the population figure reported in EPA's Safe Drinking Water Information System (SDWIS) inventory as the authoritative number, with adjustments for documented seasonal population. A utility with 3,800 residential service connections serving an average of 2.6 persons per connection has a service population of roughly 9,880 — below the threshold. The same utility with 4,000 connections at the same household size crosses 10,400 — above the threshold. Because the threshold is inclusive, a system at exactly 10,000 served must produce two deliveries per year.

Three boundary cases trip utilities up consistently. First, seasonal systems: a mountain community or a shoreline district whose population balloons from 6,000 year-round to 18,000 in summer. The primacy agency determines whether the peak seasonal figure, the annual-average figure, or a weighted figure controls. Second, wholesale arrangements: a wholesale producer selling to retail utilities generally does not have direct CCR delivery obligations to the retail customers, but the retail utility's service-population figure is what matters for its own biannual obligation. Third, consecutive systems buying finished water from a regional wholesaler: the consecutive system's own service population controls, regardless of the wholesaler's size. When in doubt, the SDWIS inventory population, current as of the start of the compliance year, is the reference figure. Small systems sitting near the threshold should consult our small utility compliance guide and the CCR 2027 deadline calendar to plan accordingly.

What the second distribution must include

The revised rule and EPA's supporting implementation documentation contemplate the second distribution as a mid-cycle update, not a reissue of the July report. Three categories of content are required or expected.

Updated contaminant data, if any exists. If the utility has received monitoring results during the first half of the calendar year that differ materially from the data in the July report — a new detection, a new exceedance, a change in the 90th-percentile lead or copper result — that information belongs in the second distribution. If no new material data has come in, the second distribution can reference the unchanged status.

Violation notifications that have occurred since the July delivery. Any health-based violation, monitoring-and-reporting violation, or treatment-technique violation that the utility has experienced in the preceding six months must be disclosed in the second distribution using the EPA-standardized health-effects language. This is the content that most directly serves the statutory rationale for biannual distribution: closing the gap between the occurrence of a compliance event and the next scheduled customer communication.

A change summary. EPA's supporting materials describe the second distribution as an opportunity to note any changes since the July report — a new source coming online, a change in treatment process, completion of a lead service line replacement milestone, a boil-water advisory that was issued and lifted. The summary format is not prescribed; primacy agencies have discretion to require specific elements. See our how to write a CCR guide for template-level drafting guidance.

The second distribution is not a second opportunity to repeat all prior-year data. The full detected-contaminants table, source-water summary, and glossary remain anchored in the July report; the second distribution points back to the July report for that content and adds the incremental updates.

The two delivery windows

The first delivery window is unchanged: the CCR covering the prior calendar year is due to customers by July 1 of the current year. A CCR covering calendar year 2026 data must reach customers by July 1, 2027.

The second delivery window is fixed by federal rule, not left to primacy-agency discretion. Under §141.155(j)(2), the second report must be delivered to customers by December 31 of the same calendar year as the first delivery. That means the second 2027 distribution is due to customers by December 31, 2027, covering the period since the July 1 report. There is no January-of-the-following-year grace period; the second delivery closes inside the same compliance year.

State primacy programs may add stricter delivery requirements (an earlier date, a specific window, or additional content) but cannot relax the federal December 31 backstop. Utilities should confirm the primacy agency's final adopted text rather than assume the federal minimum applies unchanged. The CCR 2027 deadline calendar tracks state-by-state adoption as primacy agencies publish final rules. For electronic delivery mechanics, see CCR electronic delivery.

Wholesale and consecutive systems have parallel handoff deadlines. Per §141.152(d)(1), a seller community water system must deliver the information required by §141.153 to a buyer system by April 1, 2027, and annually thereafter. Per §141.152(d)(3), a seller supplying a buyer that is subject to biannual distribution must additionally deliver the §141.155(j) information by October 1, 2027, and annually thereafter, so the buyer has time to assemble the December 31 report.

Why EPA added biannual

The statutory basis for biannual distribution is not the original 1996 Safe Drinking Water Act Amendments but the America's Water Infrastructure Act of 2018 (AWIA), which directed EPA to revise the CCR Rule to improve readability and to require biannual distribution for systems serving 10,000 or more people. EPA's 2024 Federal Register preamble at 89 FR 45980 cites two main rationales.

The first is reducing the gap between a compliance event and customer awareness. Under the 1998 one-a-year model, a violation or notable change occurring in August would appear in a CCR delivered the following July — an eleven-month latency, assuming the utility relied solely on the CCR rather than the separate public-notification rule. Tier 1 and Tier 2 public notifications remain obligatory for specific violation types on their own shorter schedules, but the CCR is the customer communication that reaches every household with a consolidated plain-language summary. A second distribution halves the latency for non-Tier-1 events.

The second is consumer-awareness reinforcement. EPA's rationale, drawing on behavioral-communications research, is that repeat exposure to water-quality information improves retention and customer engagement. A single annual report tends to land during summer billing cycles, get briefly noted, and be set aside. A second report, arriving six months later, reinforces the content and gives customers a second touchpoint at which to ask questions or follow up.

EPA acknowledged in the preamble that biannual distribution imposes incremental costs — printing, postage, staff time — and limited the requirement to systems serving 10,000 or more specifically to avoid burdening the very small systems where the ratepayer base cannot easily absorb the added cost. The threshold was set to capture the systems serving the largest share of the US population while leaving smaller systems on the traditional annual schedule. See the broader revised CCR rule 2027 summary for how biannual distribution fits alongside direct-URL e-delivery, readability, and translation requirements.

Operational impact on utilities

The operational impact falls into four categories: production, distribution, archive, and staffing.

Production. A second cycle means a second internal drafting, review, and primacy-agency submission pass. Utilities that historically produced the CCR as a spring project now need a fall or early-winter production window built into the calendar. Most utilities will find that the second cycle is materially shorter than the first because the template and data anchors are already in place; typical incremental production time is 40 to 80 staff hours for a mid-sized system.

Distribution. Printing and postage costs double for paper-based utilities. Utilities that have moved to direct-URL e-delivery absorb the second distribution at near-zero incremental cost, which is part of why EPA's cost-benefit analysis assumed significant e-delivery uptake among systems above 10,000. Hybrid utilities — e-delivery for opted-in customers, paper for the rest — will see postage cost increases proportional to the paper share of their customer base.

Archive. The ten-year retention obligation applies to both distributions. Utilities need to file the second distribution alongside the July report in their compliance archive, with clear date stamps distinguishing the two. Our CCR software guide covers archive and publication workflow tooling that handles both cycles without duplicated effort.

Staffing. A single dedicated CCR owner can manage one cycle a year. Two cycles a year either require backup coverage (for vacation, turnover, or illness during the production window) or a designated secondary owner. Utilities that staff CCR production as a part-of-the-job assignment to a water quality manager frequently underestimate this point.

For a full preparation checklist, see the CCR 2027 checklist.

Coordinating with billing cycles and customer communications

The most efficient utilities are integrating the second CCR distribution into existing customer-communication rhythms rather than treating it as a standalone event.

Billing insert coordination. If the utility uses billing inserts for the July distribution, the second distribution should use the same delivery channel for consistency. Because the federal deadline is December 31, target a billing cycle that lands in mid-to-late November or early-to-mid December so inserts reach customers before year-end. Coordinate printer lead times; most billing insert printers need a 10-to-14-day pre-insertion draft lock.

Rate case and annual meeting timing. Utilities that hold annual public meetings or file periodic rate cases often have public communications windows that overlap the second CCR cycle. Attaching the second CCR distribution to a rate-case hearing notice or an annual-meeting mailer reduces incremental postage cost and improves the chance that customers actually read the content.

Digital and social media. The second distribution is an opportunity to refresh the website banner pointing to the CCR, update the automated response in the utility's customer-service voicemail, and post a social-media reference — not as compliant distribution in itself, but as supporting signals that direct customers to the compliant direct-URL delivery. See what is a CCR for consumer-facing explainer content suitable for social and email use.

Language-access coordination. If the utility has translation obligations, the second distribution cycle needs translator contracts and turnaround times that match the production schedule. Translator pricing is sometimes discounted for annual contracts covering both cycles rather than ad-hoc per-cycle engagement.

Common mistakes and how to avoid them

Five mistakes show up repeatedly in early compliance planning.

Treating the second distribution as a duplicate of the July report. It is not; it is a mid-cycle update focused on changes and new events. Duplicating the July content wastes production time and postage and annoys customers.

Missing the primacy agency's specific second-delivery date. The federal backstop under §141.155(j)(2) is December 31. The primacy agency's adopted rule may require an earlier date, a specific window, or a coordination protocol. Confirm the adopted text — do not assume the federal December 31 backstop applies unchanged.

Forgetting biannual distribution during population-growth reclassification. A system that crosses the 10,000 threshold mid-compliance-year needs to confirm with its primacy agency when the biannual obligation kicks in. Most primacy agencies use the population figure as of the start of the calendar year, but this should be verified, not assumed.

Underfunding the second cycle in the annual budget. If the compliance budget assumes one CCR production-and-distribution pass, the second pass will quietly absorb discretionary funds elsewhere. Build both cycles into the budget line items from the start.

Failing to sync the second distribution with ongoing utilities communications. The second CCR is a customer-communication touchpoint. Treat it as part of the utility's integrated communications plan, not as an isolated regulatory task.

FAQ

Who exactly has to distribute twice yearly?

Community water systems serving a population of 10,000 or more people, as reflected in their SDWIS service-population figure. The threshold is inclusive and is a person count, not a connection count. Non-community systems are not subject to the CCR Rule and therefore not subject to biannual distribution. Systems serving fewer than 10,000 continue on the traditional annual schedule unless their primacy agency has adopted a more stringent requirement.

Can the second delivery be electronic only?

Yes, on the same terms as the July delivery. Direct-URL electronic delivery is a formally supported method under the revised rule for any community water system regardless of size, subject to primacy-agency rules on customer notification, email validation, and paper-copy-on-request availability. If the utility is already running direct-URL e-delivery for the July distribution, extending the same workflow to the second distribution adds minimal operational overhead. See CCR electronic delivery for the mechanics.

What if my population fluctuates around 10,000?

The primacy agency's interpretation of the SDWIS service-population figure controls. Most primacy agencies use the population figure as of January 1 of the compliance year, meaning a system that crosses 10,000 in June continues on annual distribution for that year and moves to biannual the following year. Seasonal systems — where peak summer population differs materially from annual-average population — should get a written determination from the primacy agency. Do not rely on verbal guidance for a threshold this consequential.

Does the second CCR need new data or just a reminder?

The second distribution is a mid-cycle update. If new monitoring data, new violations, or material operational changes have occurred since the July report, they must be disclosed. If nothing material has changed, the second distribution can state that and reference the July report for the full data. What it cannot be is a marketing-style reminder that omits any new compliance-relevant content; if a violation occurred in August, the December distribution must address it.

When does biannual delivery start?

The first CCR prepared under the revised rule covers calendar year 2026 data and must reach customers by July 1, 2027. For systems subject to biannual distribution, the second 2027 distribution is due to customers by December 31, 2027, per §141.155(j)(2). From that point forward, biannual delivery is a permanent twice-per-calendar-year obligation on the same July 1 / December 31 cadence.

Sources

1. 40 CFR Part 141 Subpart O — Consumer Confidence Reports (eCFR, accessed April 18, 2026). See especially §141.152(d)(1) and (d)(3) on wholesaler handoff dates, §141.155(i) on applicability of biannual delivery, and §141.155(j) on content and the December 31 second-delivery deadline.
2. National Primary Drinking Water Regulations: Consumer Confidence Reports, 89 FR 45980 (May 24, 2024) — final rule, docket EPA-HQ-OW-2022-0260. Preamble discussion of biannual-distribution rationale and cost-benefit analysis.
3. EPA Consumer Confidence Report Rule landing page — program overview and implementation resources for utilities and primacy agencies.
4. EPA: Consumer Confidence Report Rule Revisions — EPA implementation guidance for the 2024 revisions, including timelines and tools.
5. America's Water Infrastructure Act of 2018 (Public Law 115-270), Section 2008 — statutory basis directing EPA to require biannual distribution for community water systems serving 10,000 or more.