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Counties → Michigan

Shiawassee County, Michigan

SDWIS compliance plate

Sheet MI155 · Shiawassee County 142 sys · 4,115 viol · #1011/3254

VIOL-SEVERE · HEALTH-LOW · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-LARGE · BOOK-FULL

  • VIOL-SEVERE 95.8% flagged
  • HEALTH-LOW 13.3% health
  • RANK-UPPER #1011/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 99%
  • SYS-LARGE 142 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Clinton County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Shiawassee County ranks #1,011 of 3,254 counties by people served, and #33 of 83 counties in Michigan. See methodology · corpus placement.

Shiawassee County standing, mid-flagged corpus third

Flagged-system rate 95.8% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 13.3% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,011 of 3,254 · #33 of 83 in Michigan.

Flagged-rate neighbourhood around Shiawassee County

Lowest/highest poles plus in-state counties nearest Shiawassee County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Oscoda · lowest Genesee · near Shiawassee · this county Menominee · highest 52.9% 95.7% 95.7% 95.7% 95.8% 96.2% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Owosso, City Of 16,353 24 Clean
Durand, City Of 3,446 32 Clean
Perry, City Of 2,065 4 -
Corunna, City Of 2,028 8 -
Mdot - Woodbury Rest Area 1,200 15 -
Speedway #8387 1,001 2 -
Leisure Lake Snack Bar 1,000 16 -
Bancroft, Village Of 616 74 -
New Lothrop, Village Of 610 31 -
Byron, Village Of 581 45 -
Laingsburg Middle School 550 95 -
Laingsburg Elementary School 550 78 -
Woods and Fields Communities East 528 30 -
St. Mary's Catholic Church (Hall) 500 3 -
Reed-Raymond VFW Post #2272 500 14 -
St. Mary's Catholic Church 500 4 -
Countryside Village 490 6 -
Leisure Lake Condo Assn. 425 22 -
Redeemer Lutheran Church-Owosso 412 12 -
Morrice Elementary 405 25 -
Holiday Shores RV MHP Resort LLC 400 24 -
Gracepointe Wesleyan Church 400 10 -
Laingsburg High School 392 30 -
Lakeview Estates 380 47 -
Sresd College & Career Readiness Center 300 62 -
Morrice High School 300 131 -
Edgewood Gardens 300 19 -
Shiawassee Harvest Ministries 300 1 -
Eagles Cove 300 15 -
Morrice Meadows 258 24 -
Northwoods Community 238 64 -
First Church of the Nazarene - Owosso 210 23 -
Bj's Fine Foods 200 8 -
Graham Community Church Shaftsburg 200 78 -
Riverwood Crossing Mall #1 200 51 -
Riverwood Crossing Plaza 200 122 -
Big Boy Restaurant Affiliates, LLC 200 71 -
Sage Market 200 11 -
Campgrounds R US 200 10 -
Owosso Speedway 200 16 -
Durand Church of the Nazarene 188 3 -
Woods and Fields Communities West 185 17 -
Walnut Hills Family Campground 167 14 -
Walnut Hills Family Campground 164 16 -
Walnut Hills Family Campground Wl003 160 16 -
First Church of God - Owosso 150 35 -
Laingsburg Shopping Center 150 5 -
Health Park Building 300 150 6 -
Health Park Building 100 150 8 -
Ovid Medical Care 150 9 -

Compare beyond Michigan

Mid-flagged peers for Shiawassee County

Cross-state counties nearest Shiawassee County on flagged-system share (95.8%) and cumulative violation count (4,115). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.