How many water violations are in Clayton County?

Clayton County has 4,028 total drinking water violations across 45 water systems, of which 831 are health-based violations. 100.0% of systems have at least one violation.

How many people get water from Clayton County systems?

Water systems in Clayton County serve approximately 13,347 people through 45 public water systems.

Has PFAS been detected in Clayton County water?

No UCMR5 PFAS testing results are in this extract for Clayton County water systems.

What types of water sources supply Clayton County?

Water systems in Clayton County use GW (45 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. 20.6% of Clayton County's violations are health-based. Among counties with any SDWIS violations, this extract puts Clayton County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

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

According to EPA SDWIS county population served used on /counties, Clayton County ranks #2,118 of 3,254 counties by people served, and #46 of 99 counties in Iowa. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Iowa

Clayton County, Iowa

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet IA043 · Clayton County 45 sys · 4,028 viol · #2118/3254

VIOL-SEVERE · HEALTH-MID · RANK-LOWER · PHOTO-FINISH · PFAS-NONE · SRC-GW · SYS-MID · BOOK-MOST

VIOL-SEVERE 100.0% flagged
HEALTH-MID 20.6% health
RANK-LOWER #2118/3254
PHOTO-FINISH ±0.0 pp
PFAS-NONE No UCMR5 set
SRC-GW GW lead 100%
SYS-MID 45 systems
BOOK-MOST 6/7 fields

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

According to EPA SDWIS county population served used on /counties, Clayton County ranks #2,118 of 3,254 counties by people served, and #46 of 99 counties in Iowa. See methodology · corpus placement.

Clayton County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 20.6% is health-based share in the middle third (≤ 24.5%) . No UCMR5 tests in this extract for Clayton County . Population served ranks #2,118 of 3,254 · #46 of 99 in Iowa.

Water Systems

System Name	Population	Violations	PFAS
Guttenberg Water Utility	1,817	37	-
Monona Municipal Water Dept	1,471	34	-
Elkader Muni Water Dept	1,219	151	-
Strawberry Point Water Supply	1,155	21	-
Edgewood Water Supply	939	11	-
Garnavillo Water Supply	763	31	-
McGregor Water Dept	747	4	-
Starmont Community School District	742	188	-
Pikes Peak State Park-Campground	720	68	-
Marquette Water Supply	429	57	-
Effigy Mounds National Monument	328	43	-
Luana Water Works	301	28	-
Farmersburg Waterworks	276	6	-
Prairie Farms Dairy, Inc.	205	22	-
Volga Water Supply	203	107	-
Camp C S Klaus Boy Scout Camp	152	130	-
Paradise Valley Resort	150	136	-
Breezy Pointe Subdivision	130	62	-
Guttenberg Golf & Country Club	129	87	-
Elkader Grace Evangelical Free Church	120	62	-
Spook Cave and Campground	118	42	-
Saint Olaf Water Supply	106	22	-
Camp Ewalu - Cedar Lodge	100	108	-
Rausch Cafe	89	46	-
Osborne Outdoor Education Center	84	71	-
Kingdom Hall	80	83	-
Clayton Hills Campground	80	123	-
Maggies Diner	70	218	-
Lazy Susan Campground	70	52	-
Lowells Landing HOA	68	49	-
Clayton Water Supply	45	63	-
Elkader Golf & Country Club	45	176	-
Miners Creek Hideaway	45	50	-
Pints River Bar	36	94	-
Anchor Inn (Garber)	35	355	-
Pattison Shop	34	35	-
Clayton Co Law Enforcement Center	30	19	-
Some Place Bar & Grill	30	32	-
Sears 66 Service	28	67	-
Tri-City Golf Club	28	38	-
Scenic Acres	27	35	-
Camp Ewalu - Pool	27	34	-
Stockyard	26	678	-
Gunder Roadhouse	25	231	-
Walters Mobile Home Park	25	22	-

Compare beyond Iowa

Mid-flagged peers for Clayton County

Cross-state counties nearest Clayton County on flagged-system share (100.0%) and cumulative violation count (4,028). 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.