County Water Quality Report

Oakland County, Michigan

8 public water systems serving 539,810 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
C
77/100
Utilities rated 8
Population served 539,810

Top water quality concerns in Oakland County

  • Haloacetic acids (HAA9) significantly above health guidelinein 8 of 8 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 7 of 8 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 7 of 8 utilities
  • Arsenic significantly above health guidelinein 1 of 8 utilities
  • Perfluorohexane sulfonate (PFHXS) significantly above health guidelinein 1 of 8 utilities

All utilities in Oakland County

Click any utility for full grade card, contaminant data, and treatment plant contact info.

B
79/100

ROCHESTER HILLS

ROCHESTER HILLS · 74,000 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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B
79/100

PONTIAC

PONTIAC · 63,776 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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B
79/100

ROYAL OAK, CITY OF

ROYAL OAK · 57,236 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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B
78/100

FARMINGTON HILLS, CITY OF

FARMINGTON HILLS · 56,984 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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B
78/100

NOVI, CITY OF

NOVI · 56,780 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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B
78/100

SOUTHFIELD

SOUTHFIELD · 71,739 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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B
78/100

TROY

TROY · 85,854 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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C
68/100

WATERFORD TOWNSHIP

WATERFORD · 73,441 residents

Top concern: Arsenic significantly above health guideline

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