How many water violations are in Marion County?

Marion County has 5,652 total drinking water violations across 56 water systems, of which 619 are health-based violations. 92.9% of systems have at least one violation.

How many people get water from Marion County systems?

Water systems in Marion County serve approximately 949,929 people through 56 public water systems.

Has PFAS been detected in Marion County water?

Under EPA UCMR5, 2 of 3 tested systems in Marion County had at least one PFAS detection (66.7% of the UCMR5-tested subset - not of all 56 SDWIS systems).

What types of water sources supply Marion County?

Water systems in Marion County use GW (54 systems), SW (2 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. 11.0% of Marion County's violations are health-based. Among counties with any SDWIS violations, this extract puts Marion County in the middle health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

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

According to EPA SDWIS county population served used on /counties, Marion County ranks #60 of 3,254 counties by people served, and #1 of 92 counties in Indiana. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Indiana

Marion County, Indiana

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet IN097 · Marion County 56 sys · 5,652 viol · #60/3254

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

VIOL-SEVERE 92.9% flagged
HEALTH-LOW 11.0% health
RANK-TOP #60/3254
PHOTO-FINISH ±0.4 pp
PFAS-HIGH 66.7% detect
SRC-GW GW lead 96%
SYS-MID 56 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Carroll County ( -0.4 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Marion County ranks #60 of 3,254 counties by people served, and #1 of 92 counties in Indiana. See methodology · corpus placement.

Marion County standing, mid-flagged corpus third

Flagged-system rate 92.9% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 11.0% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 66.7% is UCMR5 detect rate above the tested-pool upper third (> 33.3%) . Population served ranks #60 of 3,254 · #1 of 92 in Indiana.

Water Systems

System Name	Population	Violations	PFAS
Citizens Water - Indianapolis	880,345	37	Detected
City of Lawrence Utilities	49,000	38	Clean
Speedway Water Works	10,578	214	Detected
Southeastway Comfort Station	1,500	27	-
McDonalds Restaurant #12354	912	74	-
S & S Gas Station LLC	759	55	-
Madhar Petroleum	602	161	-
Nativity Catholic Church & Community Ctr	500	15	-
Morningstar Golf Club	500	155	-
Lighthouse Baptist Church	471	46	-
Nativity Catholic School	425	52	-
Gurdwara Sikh Satsang of Indianapolis	302	0	-
Kingdom Hall of Jehovah's Witnesses	300	0	-
Raceway Petro Inc.	300	30	-
Good Shepherd UMC/Little Lamb Chldrn Min	230	1,286	-
Eagle Creek Golf-Comfort Station	225	187	-
Winding River Golf Club	200	206	-
Southeastway Park	200	117	-
Eagle Creek Sailing Club	200	57	-
Acton United Methodist	175	175	-
Traders Point Farm Organics, Inc.	139	4	-
Whispering Hills Golf	132	60	-
Pitt-Ohio - Office Building	118	10	-
Southminster Presbyterian/Loving Hearts	108	42	-
Freba Corp Dba Dakota Landing Golf	100	23	-
Gospel Assembly	100	34	-
Eagle Creek Grace Bible Church	100	36	-
Food Corner (Phillips 66)	93	181	-
The Bible Church of Indianapolis, Inc.	80	42	-
48Forty Solutions LLC	75	142	-
Kingdom Hall of Jehovah's Witnesses	75	0	-
Shelby Street Pentecostal Lighthouse	75	207	-
Krishnas Emerson LLC	71	294	-
Indy Tabernaculo International Inc	64	94	-
Central Baptist Church of Bridgeport	60	29	-
McGregor Road Baptist Church	60	135	-
Brewskies Pub and Eatery	60	99	-
Martin Marietta - Kentucky Avenue Mine	59	46	-
Burger King #835	55	52	-
Newfields Visitors Pavillion	51	9	-
South Emerson Church of God	50	63	-
Hall Family Dentistry	49	19	-
Bobcat of Indy	43	16	-
Hope Christian Church	35	21	-
Generations Grill	35	294	-
Southeast Family Dental	33	20	-
The Rejoicing Vine	32	0	-
Buck Creek Winery	30	11	-
Liberty Tire, LLC	30	3	-
VFW #7119	30	86	-

Compare beyond Indiana

Mid-flagged peers for Marion County

Cross-state counties nearest Marion County on flagged-system share (92.9%) and cumulative violation count (5,652). 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.