How many water violations are in DeKalb County?

DeKalb County has 2,628 total drinking water violations across 48 water systems, of which 383 are health-based violations. 95.8% of systems have at least one violation.

How many people get water from DeKalb County systems?

Water systems in DeKalb County serve approximately 31,561 people through 48 public water systems.

Has PFAS been detected in DeKalb County water?

Under EPA UCMR5, 0 of 2 tested systems in DeKalb County had at least one PFAS detection (0.0% of the UCMR5-tested subset - not of all 48 SDWIS systems).

What types of water sources supply DeKalb County?

Water systems in DeKalb County use GW (48 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. 14.6% of DeKalb County's violations are health-based. Among counties with any SDWIS violations, this extract puts DeKalb County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

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

According to EPA SDWIS county population served used on /counties, DeKalb County ranks #1,319 of 3,254 counties by people served, and #38 of 92 counties in Indiana. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Indiana

DeKalb County, Indiana

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet IN033 · DeKalb County 48 sys · 2,628 viol · #1319/3254

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

VIOL-SEVERE 95.8% flagged
HEALTH-LOW 14.6% health
RANK-MID #1319/3254
PHOTO-FINISH ±0.1 pp
PFAS-CLEAN 0.0% detect
SRC-GW GW lead 100%
SYS-MID 48 systems
BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, DeKalb County ranks #1,319 of 3,254 counties by people served, and #38 of 92 counties in Indiana. See methodology · corpus placement.

DeKalb 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 14.6% 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 #1,319 of 3,254 · #38 of 92 in Indiana.

Water Systems

System Name	Population	Violations	PFAS
Auburn Water Department	12,800	4	Clean
Garrett Water Utility	6,390	37	Clean
Butler Water Department	2,700	96	-
Waterloo Water Works	2,242	7	-
Lakewood Park Baptist Church/School	1,100	23	-
Steel Dynamics	1,000	203	-
St. Michaels Church	601	10	-
St. Joe Water Department	460	93	-
All American Stores - Laotto	404	47	-
Indian Springs Campground Resort	384	66	-
Vulcraft	281	22	-
New Millennium Building Systems, LLC	270	0	-
Corunna Water Utility	255	148	-
Nucor Fastener	243	16	-
Millers Shellmart	204	25	-
Ben Mar Chateau	166	89	-
Auburn Gear, Inc.	140	7	-
Tri-Wall/International Paper	135	53	-
Story Lake Rsrt-Well 7-Main & 11-Helper	120	157	-
Heidtman Steel Products - Office at Main	114	85	-
Heidtman Steel Products - West at Main	114	14	-
Klink Trucking	90	6	-
Wayne Manufacturing Corp.	90	263	-
Fireside Resort	81	139	-
Hopewell U.b. Church	80	28	-
Cedar Lake Church of the Brethren	80	30	-
Thomas Funeral Home	76	14	-
X Y Tool & Die, Inc.	74	3	-
McP - Magic Coil Products	70	118	-
St. Joe Valley Conservation Club	70	41	-
Heidtman Steel Products - Sheet Products	66	92	-
Waterloo Freewill Baptist Church	65	16	-
Paragon Steel	60	76	-
Coburn Corners Church of Christ	60	32	-
Pickle Properties	55	60	-
Country Heritage Winery & Vineyard	51	23	-
Rhinehart Finishing, LLC.	43	111	-
Pleasant Chapel Church of the Brethren	41	40	-
New Process Steel	37	43	-
Air Products & Chemicals, Inc.	31	110	-
S.r.c. Estate LLC	30	0	-
Paragon Steel - Headquarters	30	3	-
Old Castle	29	14	-
Story Lake Resort - Well #14 - Entrance	29	97	-
Dekalb Meadows Amish School	25	3	-
South East Dekalb Amish School	25	3	-
Dollar General - Spencerville	25	14	-
Cedar Lake Church of Christ	25	47	-

Compare beyond Indiana

Mid-flagged peers for DeKalb County

Cross-state counties nearest DeKalb County on flagged-system share (95.8%) and cumulative violation count (2,628). 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.