Public water system · IL0971550

Active

Round Lake Beach

At a glance

Round Lake Beach (PWSID IL0971550) is an active community water system in Lake County, Illinois. It reports serving 27,200 people through 8,606 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

27,200

Service connections

8,606

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDIL0971550

System typeCommunity water system

Activity statusActive

Population served27,200

Service connections8,606

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyIL state drinking water program

City servedRound Lake Beach

StateIllinois

ZIP—

CountyLake County

How does Round Lake Beach compare with other water systems in Lake County?

By EPA's size categories, Round Lake Beach is a large system (10,001 to 100,000 people). Lake County has 266 active public water systems, and Round Lake Beach is the 6th-largest of them by population served. Its population served is about 11 times the county average of 2,442 people per system, and accounts for 4.2% of the 649,474 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active community water system reports serving 6,703 people, so Round Lake Beach is about 4.1 times that figure.

What does “community water system” mean?

A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Illinois has 1,773 active community water systems, 46% of the state's 3,872 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 619 Illinois systems (16%) list purchased surface water as their primary source.

Who owns and regulates Round Lake Beach?

EPA lists Round Lake Beach as owned by a local government. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 60 of the 266 active systems in Lake County (23%) are also owned by a local government.

Does Round Lake Beach have drinking water violations?

EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2025. The violations listed here began between June 1977 and January 2025. By type: 4 monitoring and reporting, 3 public notice, recordkeeping or other and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 9 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.

Began	Violation	Contaminant or rule	Health-based	Status
2025-01-01	Monitoring and reportingMonitoring, Regular · code 03	Glyphosatecode 2034	No	Resolved
2023-07-10	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2020-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2020-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2018-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2014-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2006-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2004-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
1985-12-09	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Combined Radium (-226 and -228)code 4010	Yes	Resolved
1977-06-30	Monitoring and reportingMonitoring, Regular · code 03	Gross alpha (excluding radon and uranium)code 4000	No	Archived

All 10 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Round Lake Beach: frequently asked questions

Who runs Round Lake Beach?

Round Lake Beach (PWSID IL0971550) is a community water system owned by a local government. It is regulated by the IL state drinking water program.

How many people does Round Lake Beach serve?

Round Lake Beach reports serving 27,200 people through 8,606 service connections in Lake County, Illinois.

Where does Round Lake Beach get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does Round Lake Beach have any drinking water violations?

EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Round Lake Beach's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in January 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.

Where can I find Round Lake Beach's water quality report?

As a community water system, Round Lake Beach must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Lake County

Water system	County	Population served	Type	Source
Waukegan	Lake	87,149	Community	Surface water
Vernon Hills - Lake Co Pw	Lake	33,207	Community	Purchased surface water
Mundelein	Lake	31,500	Community	Purchased surface water
Gurnee	Lake	30,193	Community	Purchased surface water
Highland Park	Lake	30,176	Community	Surface water
Zion	Lake	24,442	Community	Purchased surface water

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About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Round Lake Beach, PWSID IL0971550, Illinois”, https://aquacensus.com/water-systems/illinois/round-lake-beach-il0971550 (data as of October 1, 2026).