Updated 2026-10-15

County water report

Macomb County Water Quality: 7 Cities Ranked by the Records

Name: Macomb County Water Quality Data (2026)
Creator: PurityMap
License: https://creativecommons.org/licenses/by/4.0/

Macomb County, Michigan: 7 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my system Open on the map Private wells in Macomb County

Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

Lead (90th percentile)Detected in 3 systems of 7 tested15 µg/L federal action level · US EPAHighest8.68 µg/L

ROSEVILLE, CITY OF8.68 µg/LMonitoring period: 2025–2025
WARREN, CITY OF2.7 µg/LMonitoring period: 2025–2025
MOUNT CLEMENS, CITY OF1.6 µg/LMonitoring period: 2025–2025
EASTPOINTE, CITY OFNot detectedMonitoring period: 2026–2026 (still open)
FRASER, CITY OFNot detectedMonitoring period: 2025–2025
NEW BALTIMORE, CITY OFNot detectedMonitoring period: 2026–2026 (still open)
STERLING HEIGHTS, CITY OFNot detectedMonitoring period: 2025–2025

Water hardnessDetected in 1 systemAesthetic, no federal health limit · USGSHighest6.1 gpg

WARREN, CITY OF6.1 gpgReporting year: 2025

1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)Detected in 1 system of 7 testedNo federal or state limit; shown for transparencyHighest7.8 ng/L

ROSEVILLE, CITY OF7.8 ng/LSample date: 2024-06-13 to 2025-03-24
EASTPOINTE, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-12-07 to 2024-08-27
FRASER, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-11-27 to 2024-08-12
MOUNT CLEMENS, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2024-02-12 to 2024-11-19
NEW BALTIMORE, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-07-10 to 2024-04-17
STERLING HEIGHTS, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-03-16 to 2023-12-12
WARREN, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-11-20 to 2024-08-05

Perfluorobutanoic acid (PFBA)Detected in 1 system of 7 testedNo federal or state limit; shown for transparencyHighest6.6 ng/L

MOUNT CLEMENS, CITY OF6.6 ng/LSample date: 2024-02-12 to 2024-11-19
EASTPOINTE, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-12-07 to 2024-08-27
FRASER, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-11-27 to 2024-08-12
NEW BALTIMORE, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-07-10 to 2024-04-17
ROSEVILLE, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2024-06-13 to 2025-03-24
STERLING HEIGHTS, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-03-16 to 2023-12-12
WARREN, CITY OFNot detected · below 5.0 ng/L lab reporting limitSample date: 2023-11-20 to 2024-08-05

28 substances tested, none detected in any systemShow

Tested in these 7 systems: EASTPOINTE, CITY OF, FRASER, CITY OF, MOUNT CLEMENS, CITY OF, NEW BALTIMORE, CITY OF, ROSEVILLE, CITY OF, STERLING HEIGHTS, CITY OF, WARREN, CITY OF

11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
Lithium
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorodecanoic acid (PFDA)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorononanoic acid (PFNA)
Perfluorooctanesulfonic acid (PFOS)
Perfluorooctanoic acid (PFOA)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)

7 cities

Cities ranked by the records

1
Sterling HeightsSTERLING HEIGHTS, CITY OF
No PFAS detected
Open city report →
2
EastpointeEASTPOINTE, CITY OF
No PFAS detected
Open city report →
3
FraserFRASER, CITY OF
No PFAS detected
Open city report →
4
WarrenWARREN, CITY OF
No PFAS detectedLead below action level
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5
New BaltimoreNEW BALTIMORE, CITY OF
No PFAS detected
Open city report →
6
Mount ClemensMOUNT CLEMENS, CITY OF
PFAS detected, within limitLead below action level
Open city report →
7
RosevilleROSEVILLE, CITY OF
PFAS detected, within limitLead below action level
Open city report →

Showing 6 of 7 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Macomb CountyPFAS detected in 2 of 7 cities; none had a sample above a 2024 EPA limit

4.0 ng/L federal MCL · PFOS, ng/LPFAS in Michigan

Lead

0of 7 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Michigan

Hard water

1city reports hardness · Warren, 6.1 gpg

None above 7 gpg, the USGS threshold for hard water. An aesthetic measure with no federal health limit.

Hard water explained

Who supplies the county

Largest water systems

WarrenWARREN, CITY OF · MI0006900
134,056 served
Sterling HeightsSTERLING HEIGHTS, CITY OF · MI0006385
127,000 served
RosevilleROSEVILLE, CITY OF · MI0005820
47,299 served
EastpointeEASTPOINTE, CITY OF · MI0001950
32,442 served
Mount ClemensMOUNT CLEMENS, CITY OF · MI0004510
16,314 served
FraserFRASER, CITY OF · MI0002460
14,297 served
New BaltimoreNEW BALTIMORE, CITY OF · MI0004670
12,720 served

Questions

Frequently asked

How does Macomb County tap water compare across cities?

PurityMap ranks 7 cities in Macomb County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Sterling Heights's main water system: STERLING HEIGHTS, CITY OF · PWSID MI0006385 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Macomb County cities had a PFAS sample above a 2024 EPA limit?

None of the 7 Macomb County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 2.

Is there lead in Macomb County tap water?

Utilities report lead as a 90th-percentile result from home taps. 3 of 7 Macomb County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Does Macomb County have hard water?

Hardness is published in utility water-quality reports for 1 Macomb County city on record; the hardest is Warren at 6.1 grains per gallon. Hardness affects scale and appliances; it is not a health finding.

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