How many water violations are in Cass County?

Cass County has 3,671 total drinking water violations across 152 water systems, of which 470 are health-based violations. 83.6% of systems have at least one violation.

How many people get water from Cass County systems?

Water systems in Cass County serve approximately 35,835 people through 152 public water systems.

Has PFAS been detected in Cass County water?

Under EPA UCMR5, 0 of 1 tested systems in Cass County had at least one PFAS detection (0.0% of the UCMR5-tested subset - not of all 152 SDWIS systems).

What types of water sources supply Cass County?

Water systems in Cass County use GW (152 systems) as their primary water sources.

Are health-based violations serious?

Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 12.8% of Cass County's violations are health-based. Among counties with any SDWIS violations, this extract puts Cass County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

Where does Cass County sit among U.S. counties for water-system population?

According to EPA SDWIS county population served used on /counties, Cass County ranks #1,197 of 3,254 counties by people served, and #39 of 83 counties in Michigan. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Michigan

Cass County, Michigan

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet MI027 · Cass County 152 sys · 3,671 viol · #1197/3254

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

VIOL-SEVERE 83.6% flagged
HEALTH-LOW 12.8% health
RANK-UPPER #1197/3254
PHOTO-FINISH ±0.1 pp
PFAS-CLEAN 0.0% detect
SRC-GW GW lead 100%
SYS-LARGE 152 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Cheboygan County ( -0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Cass County ranks #1,197 of 3,254 counties by people served, and #39 of 83 counties in Michigan. See methodology · corpus placement.

Cass County standing, lower-flagged corpus third

Flagged-system rate 83.6% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 12.8% 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 #1,197 of 3,254 · #39 of 83 in Michigan.

Water Systems

System Name	Population	Violations	PFAS
Dowagiac	6,350	50	Clean
Cassopolis	1,815	48	-
Cass County Water System	1,350	33	-
Edwardsburg	1,260	8	-
Marcellus	1,198	9	-
Howard-Ellis Elementary	780	8	-
Shady Point Campground West Well	640	17	-
Willow Shores Campground 1	600	50	-
Willow Shores Campground 2	600	0	-
Willow Shores Campground 3	600	0	-
Loyal Order of Moose 933	575	20	-
Camelot Campground	560	16	-
Camelot Campground East Well	560	0	-
Spaulding Lake Campground	484	12	-
Edwardsburg Conservation Club	400	7	-
Melville's 7 Lakes Family Campground LLC	400	36	-
Melville's 7 Lakes Fmly Cg San Station	400	0	-
Melville's 7 Lakes Family Campground Off	400	3	-
Cranberry Lake Campground	396	5	-
Cranberry Lake Campground 3	396	0	-
Eagle Lake Elem School East Well	388	22	-
Eagle Lake Elem School West Well	388	0	-
Bair Lake Bible Camp	372	5	-
Goff Lake Campground	360	0	-
Camp Tamarack	350	25	-
Hemlock Lake Campground, Inc.	332	12	-
Shady Point Campground House Well	320	0	-
American Legion #365	300	31	-
Kincheloe Elementary	300	42	-
Our Lady of the Lake Catholic Parish	300	10	-
Hope Community Church-Niles	300	4	-
Mill's Meat and Grocery	300	10	-
Colonial Acres	265	26	-
Summit Life	250	8	-
Sacred Heart of Mary-Dowagiac	250	22	-
Edwardsburg Sports Complex	250	9	-
Camp Friedenswald-Dining	240	13	-
Camp Friedenswald-South Cabins	240	6	-
Camp Friedenswald-North Cabins	240	6	-
Eagle Lake Estates MHP	230	11	-
Pitcher Lake Campground	228	5	-
Camp Tannadoonah Main Lodge	220	10	-
Camp Tannadoonah Dining Hall	220	0	-
Camp Tannadoonah Welcome Center	220	0	-
Swiss Valley Ski and Snowboard Area	200	7	-
Four Lakes Country Club	200	8	-
Lakeside Campground	200	8	-
Camp Matziv - Pool House	200	8	-
Porter Baptist Church	200	9	-
Edwardsburg Crossing-Biggby	200	8	-

Compare beyond Michigan

Lower-flagged peers for Cass County

Cross-state counties nearest Cass County on flagged-system share (83.6%) and cumulative violation count (3,671). 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

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

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.