Public water system · MI0005830
ActiveRoyal Oak, City of
At a glance
City of Royal Oak (PWSID MI0005830) is an active community water system in Oakland County, Michigan. It reports serving 57,236 people through 23,876 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
57,236
Service connections
23,876
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does City of Royal Oak compare with other water systems in Oakland County?
By EPA's size categories, City of Royal Oak is a large system (10,001 to 100,000 people). Oakland County has 734 active public water systems, and City of Royal Oak is the 6th-largest of them by population served. Its population served is about 37 times the county average of 1,561 people per system, and accounts for 5% of the 1,145,905 people reported by systems filed under the county. Across Michigan, the 10,599 active systems average 847 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Royal Oak is about 8.5 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. Michigan has 1,332 active community water systems, 13% of the state's 10,599 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 262 Michigan systems (2.5%) list purchased surface water as their primary source.
Who owns and regulates City of Royal Oak?
EPA lists City of Royal Oak as owned by a local government. The MI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 56 of the 734 active systems in Oakland County (7.6%) are also owned by a local government.
Does City of Royal Oak have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2021. The violations listed here began between July 2001 and July 2021. By type: 3 public notice, recordkeeping or other and 2 monitoring and reporting. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 5 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2019-06-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2019-06-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2016-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 5 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.
City of Royal Oak: frequently asked questions
Who runs City of Royal Oak?
City of Royal Oak (PWSID MI0005830) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does City of Royal Oak serve?
City of Royal Oak reports serving 57,236 people through 23,876 service connections in Oakland County, Michigan.
Where does City of Royal Oak 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 City of Royal Oak have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in July 2021. 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 City of Royal Oak'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 5 violations for this system; none is health-based, and the most recent began in July 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find City of Royal Oak's water quality report?
As a community water system, City of Royal Oak 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 Oakland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Troy | Oakland | 85,854 | Community | Purchased surface water |
| Rochester Hills | Oakland | 74,000 | Community | Purchased surface water |
| Waterford Township | Oakland | 73,441 | Community | Groundwater |
| Southfield | Oakland | 71,739 | Community | Purchased surface water |
| Pontiac | Oakland | 63,776 | Community | Purchased surface water |
| Farmington Hills, City of | Oakland | 56,984 | 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, “Royal Oak, City of, PWSID MI0005830, Michigan”, https://aquacensus.com/water-systems/michigan/royal-oak-city-of-mi0005830 (data as of October 1, 2026).