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Counties → Michigan

Mason County, Michigan

SDWIS compliance plate

Sheet MI105 · Mason County 87 sys · 3,061 viol · #1567/3254

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

  • VIOL-SEVERE 92.0% flagged
  • HEALTH-LOW 3.6% health
  • RANK-MID #1567/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 95%
  • SYS-MID 87 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Mason County ranks #1,567 of 3,254 counties by people served, and #56 of 83 counties in Michigan. See methodology · corpus placement.

Mason County standing, lower-flagged corpus third

Flagged-system rate 92.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 3.6% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,567 of 3,254 · #56 of 83 in Michigan.

Flagged-rate neighbourhood around Mason County

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

0% 20% 40% 60% 80% 100% Oscoda · lowest Lapeer · near Wexford · near Menominee · highest 52.9% 91.8% 91.8% 92% 92% 92.3% 100%

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

Water Systems

System Name Population Violations PFAS
Ludington 8,184 0 Clean
Ludington State Park Cg 1,700 37 -
Scottville, City Of 1,536 4 -
Tamarac Village 873 20 -
Mdot - Ludington Rest Area 700 8 -
Lamans Landing 500 18 -
Mason Co Eastern Hs 480 12 -
Pere Marquette Twp - Wells 455 22 -
Forest Trail Ez Mart 450 10 -
Days Inn - Pentwater 400 202 -
Kibby Creek Travel Park 400 16 -
Kibby Creek Family Enterprises 400 0 -
Pere Marquette Twp - Customer 339 3 -
St. Mary's Church 300 35 -
Kibby Creek Travel Park (Seasonal) 300 15 -
Fountain Market 300 20 -
Dollar General #17483 - Walhalla 300 5 -
Cox Ranch Venue 291 0 -
Indian Summer Co-Op 260 131 -
Ludington State Park Contact Station 250 9 -
Orchard Market 250 25 -
Buttersville Park 246 14 -
Dollar General - Hamlin 240 0 -
Whispering Surf at Bass Lk Cg 200 17 -
Barnharts Marina 200 136 -
Cardinal Restaurant 200 260 -
Michigan Food Processors Co-Op 187 85 -
Holiday Village Mobile Home Park 185 28 -
Jolly Plate 175 43 -
Custer VFW Gold Bar Post 5096 175 25 -
Hemlock Golf Club 175 50 -
Manistee Forest Pines Estates 174 21 -
Lighthouse Baptist Church 155 7 -
Riverside Park Campground 150 0 -
Mason County Campground 150 6 -
Pioneer Party Store 150 177 -
Henry's Landing LLC 150 10 -
Oaktree Academy 143 6 -
Our Saviour's Lutheran Church-Scottville 142 22 -
Stix 140 85 -
Ludington Pumped Storage Plant 120 77 -
Sauble Resort 120 20 -
Crossroads Church - 2384 120 38 -
Whiskey Creek Campground (Bathhouse) 102 2 -
Whiskey Creek Campground (Lodge) 100 39 -
Peaceful Acres Resort 100 14 -
Crystal Lake Campground 100 25 -
Usfs - Lmra Picnic Area Hand Pump 100 10 -
Beacon Ministries 100 11 -
Dollar General - Freesoil 100 0 -

Compare beyond Michigan

Lower-flagged peers for Mason County

Cross-state counties nearest Mason County on flagged-system share (92.0%) and cumulative violation count (3,061). 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.