Indiana Water Systems

Compiled by PlainEnviro Editorial, Environmental Data Editorial Team · July 13, 2026

718 community water systems in Indiana, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).

Water Systems

718

Total Violations

1,467

Health Violations

254 systems

Population Served

5,219,364

Indiana operates 718 community water systems regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. Together these utilities serve an estimated 5,219,364 residents, each filing compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency.

Across the state, SDWIS records contain 1,467 total violations, of which 254 systems carry at least one active health-based violation, a Maximum Contaminant Level (MCL) exceedance or treatment-technique failure. That represents roughly 35% of Indiana systems.

Violation counts reflect both infrastructure realities and reporting diligence, a state with more small rural systems will accumulate more monitoring-type violations without necessarily delivering worse water. Health-based violations are the stronger safety signal. A past violation does not itself indicate current unsafe water; utilities must notify customers, remediate, and publish an annual Consumer Confidence Report. All numbers below draw directly from the federal SDWIS record.

Which water systems have violations? (152)

#	System Name	City	Source	Violations	Pop. Served	Health
1	SCOTTSBURG WATER DEPARTMENT Scottsburg	Scottsburg	Surface Water	120	7,369	Yes
2	SALEM WATER WORKS Salem	Salem	Surface Water	71	8,200	Yes
3	KINGMAN WATER WORKS Kingman	Kingman	Groundwater	64	560	Yes
4	OOLITIC WATER WORKS Bloomington	Bloomington	Surface Water	62	1,315	Yes
5	WESTPORT WATER COMPANY Westport	Westport	Surface Water	55	1,300	Yes
6	BURNT PINES WATER ASSOCIATION North Vernon	North Vernon	Surface Water	38	900	Yes
7	NORTH VERNON WATER DEPARTMENT North Vernon	North Vernon	Surface Water	35	6,500	Yes
8	EAST WASHINGTON RURAL WATER Salem	Salem	Surface Water	32	8,613	Yes
9	POSEYVILLE MUNICIPAL WATER DEPARTMENT Poseyville	Poseyville	Groundwater	29	1,400	Yes
10	MONTEZUMA MUNICIPAL UTILITY Montezuma	Montezuma	Groundwater	29	1,022	Yes
11	STUCKER FORK WATER UTILITY Scottsburg	Scottsburg	Surface Water	18	19,120	Yes
12	BORDEN TRI-COUNTY REGION Borden	Borden	Surface Water	18	11,637	Yes
13	LYNNVILLE WATER WORKS Lynnville	Lynnville	Surface Water	18	1,200	Yes
14	INDIANA AMERICAN WATER - LOWELL Greenwood	Greenwood	Surface Water	17	11,908	Yes
15	GREENSBURG MUNICIPAL WATER WORKS Greensburg	Greensburg	Surface Water	15	12,650	Yes
16	LAUREL WATER DEPARTMENT Laurel	Laurel	Groundwater	15	560	Yes
17	KIRKLIN WATER DEPARTMENT Kirklin	Kirklin	Groundwater	14	788	Yes
18	NAPOLEON COMMUNITY RURAL WATER CORP. Napoleon	Napoleon	Surface Water	12	5,564	Yes
19	NEW PEKIN WATER UTILITY Pekin	Pekin	Surface Water	12	2,150	Yes
20	LYFORD WATER WORKS Rosedale	Rosedale	Groundwater	12	1,000	Yes
21	HAUBSTADT WATER DEPARTMENT Haubstadt	Haubstadt	Surface Water	11	1,600	Yes
22	BLOOMINGDALE WATER WORKS Bloomingdale	Bloomingdale	Groundwater	11	562	Yes
23	DUFF WATER CORPORATION Huntingburg	Huntingburg	Surface Water	9	825	Yes
24	ELLETTSVILLE WATER WORKS Ellettsville	Ellettsville	Surface Water	8	14,500	Yes
25	EAST MONROE WATER CORPORATION Bloomington	Bloomington	Surface Water	8	3,648	Yes
26	HAYDEN WATER ASSOCIATION North Vernon	North Vernon	Groundwater	8	2,395	Yes
27	GRABILL WATER WORKS Grabill	Grabill	Surface Water	8	1,163	Yes
28	VERNON WATER DEPARTMENT Vernon	Vernon	Surface Water	8	538	Yes
29	CARMEL WATER DEPARTMENT Carmel	Carmel	Surface Water	7	99,927	Yes
30	POSEY TOWNSHIP WATER CORP. Hardinsburg	Hardinsburg	Surface Water	7	3,500	Yes
31	OTWELL WATER CORPORATION Otwell	Otwell	Surface Water	7	2,100	Yes
32	LAKE SANTEE RWWD Greensburg	Greensburg	Surface Water	7	1,500	Yes
33	ABERDEEN PATE WATER COMPANY, INC. Aurora	Aurora	Groundwater	6	4,787	Yes
34	WHITESTOWN SOUTH Whitestown	Whitestown	Surface Water	5	5,880	Yes
35	MONTICELLO WATER WORKS Monticello	Monticello	Groundwater	5	5,300	Yes
36	BREMEN WATER DEPARTMENT Bremen	Bremen	Groundwater	5	4,516	Yes
37	LAPEL MUNICIPAL WATER COMPANY Lapel	Lapel	Groundwater	5	2,379	Yes
38	MILAN WATER WORKS Milan	Milan	Groundwater	5	1,980	Yes
39	REMINGTON WATER WORKS Remington	Remington	Groundwater	5	1,182	Yes
40	LYONS WATER UTILITY Lyons	Lyons	Groundwater	5	870	Yes
41	MONROE CITY WATER UTILITIES Monroe City	Monroe City	Groundwater	5	813	Yes
42	CITY OF BLOOMINGTON UTILITIES Bloomington	Bloomington	Surface Water	4	83,000	Yes
43	CITY OF LAWRENCE UTILITIES Indianapolis	Indianapolis	Groundwater	4	49,000	Yes
44	LAPORTE WATER WORKS Laporte	Laporte	Groundwater	4	22,197	Yes
45	HUNTINGTON WATER DEPARTMENT Huntington	Huntington	Groundwater	4	17,300	Yes
46	HOOSIER HILLS REGIONAL WATER DISTRICT Milan	Milan	Groundwater	4	8,660	Yes
47	RURAL MEMBERSHIP WATER CORP. OF CLARK CO Henryville	Henryville	Groundwater	4	8,250	Yes
48	HUNTINGBURG MUNICIPAL WATER Huntingburg	Huntingburg	Surface Water	4	6,526	Yes
49	PENDLETON WATER COMPANY Pendleton	Pendleton	Groundwater	4	5,758	Yes
50	TENNYSON WATER UTILITY Tennyson	Tennyson	Surface Water	4	4,158	Yes
51	DECATUR CO. WATER CORP. Greensburg	Greensburg	Surface Water	4	3,440	Yes
52	ST. PAUL MUNICIPAL WATER Arlington	Arlington	Groundwater	4	1,096	Yes
53	FORT WAYNE - 3 RIVERS FILTRATION PLANT Fort Wayne	Fort Wayne	Surface Water	3	269,994	Yes
54	ANDERSON WATER DEPARTMENT Anderson	Anderson	Surface Water	3	58,942	Yes
55	GREENCASTLE DEPARTMENT OF WATER Greencastle	Greencastle	Surface Water	3	12,699	Yes
56	NORTH LAWRENCE WATER AUTHORITY Bedford	Bedford	Surface Water	3	11,625	Yes
57	INDIANA AMERICAN WATER - CHARLESTOWN Greenwood	Greenwood	Groundwater	3	8,658	Yes
58	JASONVILLE WATER DEPARTMENT Jasonville	Jasonville	Groundwater	3	3,660	Yes
59	OAKLAND CITY WATER DEPARTMENT Oakland City	Oakland City	Surface Water	3	2,938	Yes
60	BATTLE GROUND WATER DISTRICT Battle Ground	Battle Ground	Groundwater	3	1,940	Yes
61	BIRDSEYE WATER SYSTEM Birdseye	Birdseye	Surface Water	3	972	Yes
62	VAN BUREN MUNICIPAL UTILITIES Van Buren	Van Buren	Groundwater	3	864	Yes
63	HAMMOND WATER WORKS DEPARTMENT Hammond	Hammond	Surface Water	2	78,384	Yes
64	PLAINFIELD WATER WORKS Plainfield	Plainfield	Groundwater	2	34,477	Yes
65	GERMAN TOWNSHIP WATER DISTRICT INC. Evansville	Evansville	Surface Water	2	12,890	Yes
66	PIKE-GIBSON WATER, INC. Oakland City	Oakland City	Surface Water	2	10,000	Yes
67	SOUTHERN MONROE WATER AUTHORITY Harrodsburg	Harrodsburg	Surface Water	2	8,877	Yes
68	ELWOOD WATER & SEWAGE Elwood	Elwood	Groundwater	2	8,586	Yes
69	VAN BUREN WATER, INC. Bloomington	Bloomington	Surface Water	2	6,670	Yes
70	NAVAL SUPPORT ACTIVITY, CRANE Crane	Crane	Surface Water	2	6,538	Yes
71	GAS CITY WATER DEPARTMENT Gas City	Gas City	Groundwater	2	6,000	Yes
72	NEW CHICAGO WATER WORKS Hobart	Hobart	Surface Water	2	5,500	Yes
73	CAMP ATTERBURY Edinburgh	Edinburgh	Groundwater	2	5,300	Yes
74	LAWRENCEBURG MUNICIPAL UTILITIES Lawrenceburg	Lawrenceburg	Groundwater	2	5,000	Yes
75	PLAINFIELD RE-ENTRY EDUCATIONAL FACILITY Plainfield	Plainfield	Groundwater	2	4,500	Yes
76	FORT BRANCH WATER DEPARTMENT Fort Branch	Fort Branch	Groundwater	2	4,020	Yes
77	CENTERVILLE WATER WORKS Milton	Milton	Groundwater	2	2,533	Yes
78	ROCKPORT WATER Rockport	Rockport	Groundwater	2	2,520	Yes
79	DUGGER UTILITIES Dugger	Dugger	Groundwater	2	1,935	Yes
80	WESTVILLE WATER DEPARTMENT Westville	Westville	Groundwater	2	1,800	Yes
81	ARGOS MUNICIPAL WATER PLANT Argos	Argos	Groundwater	2	1,680	Yes
82	HOGAN WATER CORPORATION Aurora	Aurora	Groundwater	2	1,238	Yes
83	WARREN MUNICIPAL WATER WORKS Warren	Warren	Groundwater	2	1,237	Yes
84	TROY WATER UTILITY Troy	Troy	Groundwater	2	1,223	Yes
85	HOLLAND WATER WORKS Holland	Holland	Surface Water	2	1,200	Yes
86	MOROCCO WATER DEPARTMENT Morocco	Morocco	Groundwater	2	1,200	Yes
87	WOLCOTTVILLE WATER WORKS Hamilton	Hamilton	Groundwater	2	1,035	Yes
88	CARTHAGE WATER DEPARTMENT New Castle	New Castle	Groundwater	2	1,000	Yes
89	FRANCESVILLE WATER DEPARTMENT Francesville	Francesville	Groundwater	2	969	Yes
90	INDIANA AMERICAN WATER - MECCA Greenwood	Greenwood	Groundwater	2	905	Yes
91	LINDEN WATER DEPARTMENT Linden	Linden	Groundwater	2	759	Yes
92	ST. BERNICE WATER CORP. St. Bernice	St. Bernice	Groundwater	2	750	Yes
93	COLFAX WATER COMPANY Colfax	Colfax	Groundwater	2	690	Yes
94	HILLSBORO WATER UTILITY Hillsboro	Hillsboro	Groundwater	2	540	Yes
95	LEBANON UTILITIES Lebanon	Lebanon	Groundwater	1	16,098	Yes
96	NEW HAVEN WATER DEPARTMENT New Haven	New Haven	Surface Water	1	15,700	Yes
97	WASHINGTON WATER WORKS Washington	Washington	Groundwater	1	13,690	Yes
98	FORTVILLE WATER WORKS Fortville	Fortville	Groundwater	1	7,638	Yes
99	LINTON MUNICIPAL WATER UTILITY Linton	Linton	Groundwater	1	7,430	Yes
100	UNIVERSITY OF NOTRE DAME Notre Dame	Notre Dame	Groundwater	1	7,400	Yes
101	MARYSVILLE OTISCO NABB WATER CORP. Marysville	Marysville	Groundwater	1	6,813	Yes
102	RUSHVILLE CITY UTILITY Rushville	Rushville	Groundwater	1	6,800	Yes
103	ROCHESTER WATER DEPARTMENT Rochester	Rochester	Groundwater	1	6,218	Yes
104	WHITELAND WATER WORKS Whiteland	Whiteland	Groundwater	1	5,955	Yes
105	CITIZENS WATER - MORGAN Indianapolis	Indianapolis	Groundwater	1	5,705	Yes
106	WHITING WATER DEPARTMENT Whiting	Whiting	Surface Water	1	4,900	Yes
107	TOWN OF ELIZABETH Elizabeth	Elizabeth	Groundwater	1	4,450	Yes
108	PITTSBORO WATER COMPANY Brownsburg	Brownsburg	Surface Water	1	4,113	Yes
109	KNOX WATER WORKS Knox	Knox	Groundwater	1	3,700	Yes
110	MIDDLEBURY WATER DEPARTMENT Middlebury	Middlebury	Groundwater	1	3,420	Yes
111	DELPHI WATER WORKS Delphi	Delphi	Groundwater	1	3,200	Yes
112	CARLISLE WATER DEPARTMENT Carlisle	Carlisle	Groundwater	1	3,125	Yes
113	WESTVILLE CORRECTIONAL FACILITY Westville	Westville	Groundwater	1	2,850	Yes
114	ALBION WATER & SEWER Albion	Albion	Groundwater	1	2,349	Yes
115	ELBERFELD WATER DEPARTMENT Elberfeld	Elberfeld	Surface Water	1	2,122	Yes
116	BLUE RIVER REGIONAL WATER DISTRICT Milltown	Milltown	Groundwater	1	2,000	Yes
117	WAKARUSA WATER WORKS Wakarusa	Wakarusa	Groundwater	1	1,998	Yes
118	CHURUBUSCO WATER DEPARTMENT Churubusco	Churubusco	Groundwater	1	1,803	Yes
119	ODON WATER UTILITIES, INC. Odon	Odon	Groundwater	1	1,703	Yes
120	NINESTAR CONNECT - GEM WATER Greenfield	Greenfield	Groundwater	1	1,700	Yes
121	HAGERSTOWN MUNICIPAL WATER WORKS Hagerstown	Hagerstown	Groundwater	1	1,700	Yes
122	GENTRYVILLE WATER UTILITY Gentryville	Gentryville	Surface Water	1	1,625	Yes
123	NATURAL PUBLIC SUPPLY, INC. Seymour	Seymour	Groundwater	1	1,560	Yes
124	KNIGHTSVILLE WATER WORKS Terre Haute	Terre Haute	Groundwater	1	1,523	Yes
125	MONROEVILLE WATER WORKS Monroeville	Monroeville	Groundwater	1	1,400	Yes
126	PARKER CITY WATER DEPARTMENT Parker	Parker	Groundwater	1	1,400	Yes
127	CULVER WATER DEPARTMENT Culver	Culver	Groundwater	1	1,391	Yes
128	CONVERSE WATER WORKS Converse	Converse	Groundwater	1	1,265	Yes
129	MORRISTOWN WATER DEPARTMENT Morristown	Morristown	Groundwater	1	1,218	Yes
130	AKRON WATER DEPARTMENT Akron	Akron	Groundwater	1	1,206	Yes
131	FREELANDVILLE WATER ASSOCIATION Freelandville	Freelandville	Groundwater	1	1,175	Yes
132	CLAY CITY WATER WORKS Clay City	Clay City	Groundwater	1	1,152	Yes
133	ANDREWS WATER DEPARTMENT Andrews	Andrews	Groundwater	1	1,149	Yes
134	OGDEN DUNES WATER Ogden Dunes	Ogden Dunes	Surface Water	1	1,110	Yes
135	PATOKA WATER COMPANY, INC. Birdseye	Birdseye	Surface Water	1	1,038	Yes
136	LANESVILLE WATER WORKS Lanesville	Lanesville	Groundwater	1	1,009	Yes
137	ROACHDALE WATER WORKS Roachdale	Roachdale	Groundwater	1	980	Yes
138	SHIRLEY MUNICIPAL WATER Shirley	Shirley	Groundwater	1	960	Yes
139	OLDENBURG WATER WORKS Oldenburg	Oldenburg	Surface Water	1	880	Yes
140	RHS WATER CORPORATION Bloomington	Bloomington	Surface Water	1	870	Yes
141	BAINBRIDGE WATER WORKS Bainbridge	Bainbridge	Groundwater	1	830	Yes
142	NEW MARKET WATER WORKS New Market	New Market	Groundwater	1	765	Yes
143	PATOKA WATER & ELECTRIC Patoka	Patoka	Groundwater	1	750	Yes
144	ATLANTA WATER DEPARTMENT Atlanta	Atlanta	Groundwater	1	735	Yes
145	HILLSDALE WATER CORPORATION Hillsdale	Hillsdale	Groundwater	1	735	Yes
146	WINDFALL WATER DEPARTMENT Greenwood	Greenwood	Groundwater	1	708	Yes
147	PENNVILLE WATER COMPANY Dunkirk	Dunkirk	Groundwater	1	706	Yes
148	DANA WATER WORKS Dana	Dana	Groundwater	1	660	Yes
149	AQUA INDIANA - WEDGEWOOD PARK WATER UTIL Indianapolis	Indianapolis	Groundwater	1	645	Yes
150	STAUNTON MUNICIPAL WATER Centerpoint	Centerpoint	Groundwater	1	550	Yes
151	CROMWELL WATER WORKS Cromwell	Cromwell	Groundwater	1	550	Yes
152	LACROSSE WATER DEPARTMENT North Judson	North Judson	Groundwater	1	540	Yes

Systems with No Violations (348)

348 water systems in Indiana have zero recorded violations. Showing the 50 largest by population served.

All Water Systems in Indiana (718)

Page 3 of 15, ordered by population served.

System	Population Served	Violations
SOUTHERN MONROE WATER AUTHORITY	8,877	2
MORGAN COUNTY RURAL WATER COMPANY	8,800	0
HOOSIER HILLS REGIONAL WATER DISTRICT	8,660	4
INDIANA AMERICAN WATER - CHARLESTOWN	8,658	3
SOUTHWESTERN BARTHOLOMEW WATER CORP.	8,652	0
EAST WASHINGTON RURAL WATER	8,613	32
ELWOOD WATER & SEWAGE	8,586	2
JENNINGS WATER, INC.	8,370	0
RURAL MEMBERSHIP WATER CORP. OF CLARK CO	8,250	4
FRANKLIN COUNTY WATER ASSOCIATION	8,200	0
HILL WATER CORPORATION	8,200	0
SALEM WATER WORKS	8,200	71
CUII - TWIN LAKES	8,000	0
EAST LAWRENCE WATER AUTHORITY	8,000	0
DAVIESS COUNTY RURAL WATER	7,969	0
FORTVILLE WATER WORKS	7,638	1
INGALLS WATER COMPANY	7,600	0
LINTON MUNICIPAL WATER UTILITY	7,430	1
UNIVERSITY OF NOTRE DAME	7,400	1
SCOTTSBURG WATER DEPARTMENT	7,369	120
BATESVILLE WATER UTILITY	7,280	0
MARYSVILLE OTISCO NABB WATER CORP.	6,813	1
NAPPANEE WATER UTILITY	6,800	0
RUSHVILLE CITY UTILITY	6,800	1
KENT WATER COMPANY	6,750	0
VAN BUREN WATER, INC.	6,670	2
INDIANA AMERICAN WATER - SULLIVAN	6,598	0
NAVAL SUPPORT ACTIVITY, CRANE	6,538	2
HUNTINGBURG MUNICIPAL WATER	6,526	4
NORTH VERNON WATER DEPARTMENT	6,500	35
MOUNT VERNON WATER WORKS	6,426	0
AURORA UTILITIES	6,415	0
SOUTH LAWRENCE UTILITIES	6,395	0
SEELYVILLE WATER WORKS	6,393	0
GARRETT WATER UTILITY	6,390	0
ROCHESTER WATER DEPARTMENT	6,218	1
PORTLAND MUNICIPAL WATER PLANT	6,209	0
YORKTOWN WATER DEPARTMENT	6,200	0
RENSSELAER WATER DEPARTMENT	6,200	0
FLOYDS KNOBS WATER COMPANY, INC.	6,100	0
NORTH MANCHESTER WATER DEPARTMENT	6,100	0
GAS CITY WATER DEPARTMENT	6,000	2
WHITELAND WATER WORKS	5,955	1
WHITESTOWN SOUTH	5,880	5
NORTH DEARBORN WATER AUTHORITY	5,775	0
PENDLETON WATER COMPANY	5,758	4
CORYDON WATER WORKS	5,716	0
CITIZENS WATER - MORGAN	5,705	1
CICERO WATER DEPARTMENT	5,607	0
HARTFORD CITY WATER WORKS	5,600	0

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Frequently Asked Questions

How many water systems are in Indiana?

Indiana has 718 community water systems tracked by the EPA, serving a combined population of 5,219,364 people.

How many water systems in Indiana have health violations?

254 water systems in Indiana have health-based violations, which include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. These represent 35% of all systems in the state.

What is the total number of water violations in Indiana?

Indiana water systems have accumulated 1,467 total violations across all 718 community water systems.

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About This Data

Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Only community water systems (CWS) are included.

Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services

Read our methodology - how this data is sourced, computed, and verified.

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