Public water system · IL1015350

Active

Petrolia PWD

At a glance

Petrolia PWD (PWSID IL1015350) is an active community water system in Lawrence County, Illinois. It reports serving 1,275 people through 510 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 2023.

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

Population served

1,275

Service connections

510

Primary source

GWP

Purchased groundwater

System type

CWS

Community water system

System record

PWSIDIL1015350

System typeCommunity water system

Activity statusActive

Population served1,275

Service connections510

Primary water sourcePurchased groundwater

Owner typeLocal government

Primacy agencyIL state drinking water program

City served—

StateIllinois

ZIP—

CountyLawrence County

How does Petrolia PWD compare with other water systems in Lawrence County?

By EPA's size categories, Petrolia PWD is a small system (501 to 3,300 people). Lawrence County has 14 active public water systems, and Petrolia PWD is the 3rd-largest of them by population served. Its population served is about 32% above the county average of 969 people per system, and accounts for 9.4% of the 13,565 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 Petrolia PWD is well below 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 groundwater means the system buys groundwater from another public water system rather than drawing its own. 348 Illinois systems (9%) list purchased groundwater as their primary source.

Who owns and regulates Petrolia PWD?

EPA lists Petrolia PWD 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. 6 of the 14 active systems in Lawrence County (43%) are also owned by a local government.

Does Petrolia PWD have drinking water violations?

EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 2023. The violations listed here began between February 1997 and October 2023. By type: 5 monitoring and reporting, 5 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Nitrate (4 of them). EPA lists 10 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
2023-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2015-10-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2013-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2010-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2009-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2005-05-06	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2005-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
2005-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
2001-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
1999-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Nitratecode 1040	Yes	Resolved
1997-02-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Archived

All 11 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.

Petrolia PWD: frequently asked questions

Who runs Petrolia PWD?

Petrolia PWD (PWSID IL1015350) is a community water system owned by a local government. It is regulated by the IL state drinking water program.

How many people does Petrolia PWD serve?

Petrolia PWD reports serving 1,275 people through 510 service connections in Lawrence County, Illinois.

Where does Petrolia PWD get its water?

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

Does Petrolia PWD have any drinking water violations?

EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in October 2023. 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 Petrolia PWD'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 11 violations for this system; 5 are health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.

Where can I find Petrolia PWD's water quality report?

As a community water system, Petrolia PWD 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 Lawrence County

Water system	County	Population served	Type	Source
Lawrenceville	Lawrence	4,524	Community	Groundwater
Bridgeport	Lawrence	2,572	Community	Groundwater
South Lawrence Water Corp	Lawrence	1,195	Community	Purchased groundwater
Sumner	Lawrence	921	Community	Purchased groundwater
Birds Pinkstaff Water District	Lawrence	920	Community	Purchased groundwater
Lawrence County Correctional Center	Lawrence	870	Community	Purchased groundwater

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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, “Petrolia PWD, PWSID IL1015350, Illinois”, https://aquacensus.com/water-systems/illinois/petrolia-pwd-il1015350 (data as of October 1, 2026).