Water Quality in Ohio
EPA violation data for public water systems across Ohio.
1,342
ZIP Codes
9,088
Total Violations
413 (31%)
ZIPs with 0 Violations
6.8
Avg per ZIP
National avg: 18.87 violations per ZIP.
Ohio is 64% below average.
Violation Map
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0
1-5
6-15
16+
EPA violations (5yr)
Most Affected Areas in Ohio
All ZIP Codes in Ohio (1,342)
45068 Lebanon
369 44319 Kent
114 43064 Columbus
90 44601 Canton
89 45241 Cincinnati
87 44632 Canton
86 44460 Youngstown
82 44024 Painesville
76 43215 Columbus
73 43026 Columbus
70 44203 Kent
65 45750 Marietta
65 44711 Canton
59 44883 Tiffin
59 44615 Carrollton
56 43420 Fremont
52 44905 Mansfield
52 45327 Dayton
52 44026 Chesterland
51 43055 Newark
50 43138 Logan
48 44240 Kent
48 45042 Dayton
48 45822 Celina
48 43054 Columbus
47 44438 Warren
46 43524 Hamler
44 45323 Springfield
44 45371 Dayton
44 44312 Kent
43 45833 Lima
43 43512 Defiance
42 44425 Youngstown
42 44021 Burton
39 44062 Warren
39 44691 Wooster
39 45036 Lebanon
37 44266 Ravenna
36 45342 Dayton
36 44086 Painesville
35 44410 Warren
35 44644 Malvern
35 45050 Hamilton
35 43164 Chillicothe
34 43311 Bellefontaine
34 44641 Canton
34 43123 Columbus
33 44216 Kent
33 45458 Dayton
32 44145 Cleveland
31 44333 Kent
31 45044 Hamilton
31 44077 Painesville
30 45005 Dayton
30 45040 Lebanon
30 45805 Lima
30 43567 Wauseon
29 44310 Kent
29 45140 Cincinnati
29 45150 Cincinnati
29 45152 Lebanon
29 43545 Defiance
28 44406 Youngstown
28 44657 Canton
28 45065 Lebanon
28 45107 Batavia
28 45122 Batavia
28 45162 Batavia
28 45309 Dayton
28 44114 Cleveland
27 44625 East Rochester
27 44720 Kent
27 44840 Wooster
27 45865 Sidney
27 43302 Marion
26 44276 Wooster
26 45501 Springfield
26 43140 Columbus
25 43506 Defiance
25 43764 New Lexington
25 44481 Youngstown
25 44622 Zoar
25 44667 Wooster
25 45032 Lebanon
25 45034 Lebanon
25 45039 Lebanon
25 45054 Lebanon
25 45066 Dayton
25 45113 Lebanon
25 45249 Cincinnati
25 45505 Springfield
25 44230 Kent
24 44842 Ashland
24 44003 Ashtabula
23 44260 Kent
23 44455 Rogers
23 44606 Wooster
23 44710 Canton
23 45373 Rossburg
23 45810 Findlay
23 44201 Canton
22 44408 Youngstown
22 44654 Millersburg
22 44676 Wooster
22 44730 Canton
22 44864 Mansfield
22 45014 Hamilton
22 45850 Lima
22 45882 Rockford
22 43072 St Paris
21 43078 Springfield
21 43326 Marion
21 43560 Toledo
21 45242 Cincinnati
21 43331 Lakeview
20 43551 Perrysburg
20 43952 Steubenville
20 44084 Ashtabula
20 44445 New Waterford
20 44685 Kent
20 44813 Mansfield
20 45344 Dayton
20 45414 Dayton
20 43739 Newark
19 43920 East Liverpool
19 43950 Saint Clairsville
19 44236 Kent
19 44620 Dellroy
19 44681 Zoar
19 44805 Mansfield
19 43076 Newark
18 43527 Defiance
18 44023 Barberton
18 44067 Kent
18 45123 Chillicothe
18 45341 Springfield
18 45502 Springfield
18 43050 Mount Vernon
17 43130 Lancaster
17 43412 Toledo
17 43431 Fremont
17 43791 Zanesville
17 44134 Cleveland
17 44647 Canton
17 44663 Zoar
17 45331 Greenville
17 45356 Piqua
17 45891 Van Wert
17 43943 Rayland
16 44065 Newbury
16 44313 Kent
16 44807 Norwalk
16 44827 Mansfield
16 44830 Findlay
16 44837 Mansfield
16 44844 Tiffin
16 45506 Springfield
16 43019 Mansfield
15 43162 West Jefferson
15 43452 Port Clinton
15 43502 Archbold
15 44210 Bath
15 44264 Kent
15 44427 Kensington
15 44449 Youngstown
15 45308 Rossburg
15 45404 Dayton
15 45644 Chillicothe
15 43207 Columbus
14 43344 Delaware
14 43402 Bowling Green
14 44224 Kent
14 44281 Kent
14 44286 Kent
14 44423 Hanoverton
14 44451 Youngstown
14 44483 Warren
14 44629 Zoar
14 44646 Canton
14 44903 Mansfield
14 45360 Sidney
14 45365 Sidney
14 45661 Portsmouth
14 45831 Defiance
14 43040 Delaware
13 43316 Findlay
13 43348 Russells Point
13 43971 Yorkville
13 44050 Lorain
13 44231 Kent
13 44287 Medina
13 44301 Kent
13 44411 Kent
13 44491 Warren
13 44662 Canton
13 44683 Zoar
13 44833 Mansfield
13 45504 Springfield
13 45629 Portsmouth
13 45844 Lima
13 45856 Findlay
13 43136 Lancaster
12 43153 Springfield
12 43832 Zoar
12 43845 West Lafayette
12 44822 Mansfield
12 44875 Mansfield
12 44904 Mansfield
12 45302 Sidney
12 45347 New Paris
12 45359 Rossburg
12 45764 Athens
12 45769 Pomeroy
12 45875 Ottawa
12 43128 Williamsport
11 43549 Defiance
11 43554 Pioneer
11 43558 Toledo
11 44022 Cleveland
11 44068 Ashtabula
11 44256 Lorain
11 44432 Lisbon
11 44444 Youngstown
11 44851 Lorain
11 44906 Mansfield
11 45118 Batavia
11 45167 Ripley
11 45319 Springfield
11 45325 Dayton
11 45369 Springfield
11 45807 Lima
11 45840 Findlay
11 45846 Fort Recovery
11 43015 Delaware
10 43084 Marysville
10 43103 Lancaster
10 43107 Lancaster
10 43445 Toledo
10 43449 Port Clinton
10 43526 Defiance
10 43968 Wellsville
10 44030 Ashtabula
10 44056 Kent
10 44131 Cleveland
10 44202 Kent
10 44265 Randolph
10 44314 Kent
10 44416 Ellsworth
10 44638 Wooster
10 44689 Canton
10 44811 Norwalk
10 44865 Mansfield
10 44878 Mansfield
10 44890 Norwalk
10 45337 Rossburg
10 45415 Dayton
10 45612 Chillicothe
10 45646 Waverly
10 45801 Lima
10 43112 Lancaster
9 43157 Lancaster
9 43201 Columbus
9 43310 Belle Center
9 43347 Rushsylvania
9 43416 Port Clinton
9 43537 Toledo
9 43702 Zanesville
9 43724 Caldwell
9 43844 Warsaw
9 43901 Adena
9 43907 Cadiz
9 43938 Mingo Junction
9 43973 Zoar
9 44046 Huntsburg
9 44212 Medina
9 44221 Kent
9 44241 Kent
9 44250 Kent
9 44402 Warren
9 44441 Negley
9 44645 Kent
9 44714 Canton
9 45002 Cincinnati
9 45011 Hamilton
9 45171 Hillsboro
9 45318 Rossburg
9 45380 Sidney
9 45613 Portsmouth
9 45660 Hillsboro
9 45813 Defiance
9 45869 Sidney
9 43004 Columbus
8 43035 Delaware
8 43060 Marysville
8 43082 Delaware
8 43113 Circleville
8 43119 Columbus
8 43160 Chillicothe
8 43356 Delaware
8 43410 Tiffin
8 43515 Delta
8 43517 Defiance
8 43701 Zanesville
8 43713 Barnesville
8 43837 Zoar
8 43985 Holloway
8 44039 Lorain
8 44099 Ashtabula
8 44106 Cleveland
8 44107 Cleveland
8 44133 Cleveland
8 44255 Kent
8 44278 Kent
8 44321 Kent
8 44512 Youngstown
8 44608 Canton
8 44614 Kent
8 44678 Zoar
8 44680 Zoar
8 44867 Tiffin
8 44889 Lorain
8 45013 Cincinnati
8 45215 Cincinnati
8 45304 Rossburg
8 45638 Ironton
8 45690 Chillicothe
8 45812 Lima
8 45851 Haviland
8 45871 Sidney
8 43105 Newark
7 43223 Columbus
7 43430 Port Clinton
7 43435 Fremont
7 43450 Pemberville
7 43516 Findlay
7 43543 Montpelier
7 43548 Defiance
7 43556 Defiance
7 43616 Toledo
7 43725 Cambridge
7 43730 Corning
7 43756 Zanesville
7 43793 Woodsfield
7 43804 Zoar
7 43913 Brilliant
7 43977 Flushing
7 43986 Jewett
7 44047 Ashtabula
7 44217 Medina
7 44223 Kent
7 44233 Medina
7 44306 Kent
7 44307 Kent
7 44609 Youngstown
7 44624 Canton
7 44634 Canton
7 44671 Zoar
7 44672 Youngstown
7 44690 Winesburg
7 44709 Canton
7 44820 Bucyrus
7 44843 Mansfield
7 44853 Tiffin
7 44901 Mansfield
7 44907 Mansfield
7 45106 Batavia
7 45133 Hillsboro
7 45144 Ripley
7 45202 Cincinnati
7 45311 Camden
7 45317 Rossburg
7 45322 Dayton
7 45334 Sidney
7 45503 Springfield
7 45648 Portsmouth
7 45711 Athens
7 45860 Maria Stein
7 45866 Celina
7 45873 Oakwood
7 45879 Paulding
7 45895 Lima
7 43143 Williamsport
6 43360 Zanesfield
6 43438 Sandusky
6 43519 Defiance
6 43520 Defiance
6 43522 Toledo
6 43530 Defiance
6 43534 Mcclure
6 43536 Defiance
6 43723 Byesville
6 43731 Crooksville
6 43762 Zanesville
6 43812 Zanesville
6 43976 Hopedale
6 44001 Lorain
6 44044 Lorain
6 44054 Lorain
6 44057 Painesville
6 44076 Warren
6 44087 Kent
6 44090 Lorain
6 44094 Painesville
6 44141 Cleveland
6 44311 Kent
6 44412 Youngstown
6 44418 Warren
6 44422 Greenford
6 44428 Warren
6 44509 Youngstown
6 44610 Berlin
6 44628 Mount Vernon
6 44688 Canton
6 44847 Norwalk
6 44855 Norwalk
6 44902 Mansfield
6 45003 Hamilton
6 45062 Hamilton
6 45069 Cincinnati
6 45157 Batavia
6 45246 Cincinnati
6 45424 Dayton
6 45449 Dayton
6 45459 Dayton
6 45656 Portsmouth
6 45657 Portsmouth
6 45671 Portsmouth
6 45723 Athens
6 45771 Racine
6 45786 Waterford
6 45817 Findlay
6 45819 Buckland
6 45821 Defiance
6 45830 Lima
6 45845 Sidney
6 45854 Lima
6 45863 Middle Point
6 45896 Lima
6 45898 Willshire
6 43027 Newark
5 43031 Delaware
5 43068 Columbus
5 43080 Newark
5 43146 Columbus
5 43150 Lancaster
5 43220 Columbus
5 43432 Port Clinton
5 43469 Port Clinton
5 43547 Toledo
5 43571 Toledo
5 43615 Toledo
5 43719 Bethesda
5 43908 Bergholz
5 44028 Lorain
5 44041 Painesville
5 44060 Painesville
5 44089 Lorain
5 44143 Cleveland
5 44232 Kent
5 44253 Lorain
5 44262 Kent
5 44270 Medina
5 44273 Medina
5 44275 Lorain
5 44280 Lorain
5 44302 Kent
5 44303 Kent
5 44304 Kent
5 44305 Kent
5 44308 Kent
5 44320 Kent
5 44325 Kent
5 44401 Youngstown
5 44436 Youngstown
5 44473 Warren
5 44484 Warren
5 44514 Youngstown
5 44619 Youngstown
5 44637 Killbuck
5 44656 Zoar
5 44707 Canton
5 44815 Tiffin
5 44880 Lorain
5 45041 Cincinnati
5 45067 Hamilton
5 45176 Batavia
5 45349 Springfield
5 45363 Sidney
5 45385 Xenia
5 45387 Springfield
5 45710 Athens
5 45740 Athens
5 45775 Rutland
5 45779 Syracuse
5 45806 Lima
5 45814 Findlay
5 45859 Mcguffey
5 45874 Ohio City
5 43023 Newark
4 43025 Newark
4 43110 Columbus
4 43135 Chillicothe
4 43147 Columbus
4 43155 Lancaster
4 43206 Columbus
4 43218 Columbus
4 43229 Columbus
4 43319 Marysville
4 43357 West Liberty
4 43440 Port Clinton
4 43442 Port Clinton
4 43457 Tiffin
4 43606 Toledo
4 43613 Toledo
4 43734 Zanesville
4 43749 Zoar
4 43779 Sarahsville
4 43840 Zoar
4 43843 Mount Vernon
4 43912 Bridgeport
4 44011 Lorain
4 44012 Lorain
4 44017 Cleveland
4 44032 Ashtabula
4 44035 Lorain
4 44049 Lorain
4 44052 Lorain
4 44053 Lorain
4 44055 Lorain
4 44074 Lorain
4 44128 Cleveland
4 44138 Cleveland
4 44288 Warren
4 44429 Youngstown
4 44446 Warren
4 44450 Warren
4 44611 Wooster
4 44612 Canton
4 44618 Canton
4 44633 Holmesville
4 44636 Kidron
4 44666 Canton
4 44687 Walnut Creek
4 44705 Canton
4 44826 Norwalk
4 44846 Norwalk
4 44850 Norwalk
4 44857 Norwalk
4 44859 Lorain
4 45015 Hamilton
4 45030 Cincinnati
4 45053 Hamilton
4 45055 Hamilton
4 45056 Hamilton
4 45064 Hamilton
4 45103 Batavia
4 45120 Batavia
4 45138 Lees Creek
4 45169 Beavercreek
4 45306 Sidney
4 45320 Eaton
4 45333 Sidney
4 45335 Beavercreek
4 45338 Lewisburg
4 45351 Osgood
4 45381 Dayton
4 45383 Rossburg
4 45388 Sidney
4 45601 Chillicothe
4 45621 Jackson
4 45624 Waverly
4 45642 Waverly
4 45651 Mcarthur
4 45674 Gallipolis
4 45698 Zaleski
4 45760 Gallipolis
4 45768 Newport
4 45828 Coldwater
4 45848 Glandorf
4 45880 Payne
4 45887 Lima
4 42148 Pleasantville
3 43001 Newark
3 43016 Columbus
3 43017 Columbus
3 43102 Lancaster
3 43149 Rockbridge
3 43212 Columbus
3 43301 Marion
3 43343 Quincy
3 43351 Upper Sandusky
3 43406 Fremont
3 43434 Toledo
3 43456 Port Clinton
3 43466 Wayne
3 43504 Toledo
3 43528 Toledo
3 43532 Toledo
3 43542 Toledo
3 43566 Toledo
3 43604 Toledo
3 43605 Toledo
3 43607 Toledo
3 43608 Toledo
3 43609 Toledo
3 43610 Toledo
3 43611 Toledo
3 43612 Toledo
3 43614 Toledo
3 43617 Toledo
3 43619 Northwood
3 43620 Toledo
3 43623 Toledo
3 43728 Athens
3 43752 Laings
3 43758 Malta
3 43759 Morristown
3 43766 New Straitsville
3 43777 Zanesville
3 43821 Zanesville
3 43822 Newark
3 43830 Newark
3 43910 Bloomingdale
3 43981 New Athens
3 43983 Piedmont
3 43988 Scio
3 44082 Ashtabula
3 44085 Ashtabula
3 44093 Ashtabula
3 44122 Cleveland
3 44139 Cleveland
3 44149 Cleveland
3 44222 Cuyahoga Falls
3 44234 Kent
3 44272 Kent
3 44404 Warren
3 44490 Youngstown
3 44515 Youngstown
3 44626 Canton
3 44682 Zoar
3 44695 Bowerston
3 44718 Canton
3 44804 Findlay
3 44836 Tiffin
3 44839 Huron
3 44841 Tiffin
3 45102 Batavia
3 45111 Cincinnati
3 45112 Batavia
3 45121 Batavia
3 45130 Batavia
3 45147 Batavia
3 45153 Batavia
3 45156 Batavia
3 45158 Batavia
3 45160 Batavia
3 45244 Cincinnati
3 45245 Batavia
3 45255 Cincinnati
3 45312 Rossburg
3 45314 Springfield
3 45326 Rossburg
3 45336 Sidney
3 45339 Rossburg
3 45340 Sidney
3 45353 Sidney
3 45354 Dayton
3 45361 Rossburg
3 45402 Dayton
3 45640 Jackson
3 45714 Belpre
3 45761 Athens
3 45827 Cloverdale
3 45836 Findlay
3 45867 Findlay
3 45885 St Marys
3 42893 Vaughnsville
2 43009 Cable
2 43011 Delaware
2 43022 Mount Vernon
2 43067 Marysville
2 43081 Columbus
2 43106 Williamsport
2 43116 Commercial Point
2 43137 Columbus
2 43144 Murray City
2 43232 Columbus
2 43315 Marion
2 43318 Degraff
2 43324 Huntsville
2 43337 Marion
2 43338 Mt Gilead
2 43341 Marion
2 43443 Luckey
2 43446 Port Clinton
2 43465 Walbridge
2 43521 Fayette
2 43533 Lyons
2 43535 Malinta
2 43565 Tontogany
2 43718 Belmont
2 43747 Jerusalem
2 43787 Stockport
2 43939 Mt Pleasant
2 43946 Sardis
2 43953 Wintersville
2 43954 New Albany
2 43961 Stratton
2 43963 Tiltonsville
2 43964 Toronto
2 43972 Harrisville
2 44045 Painesville
2 44064 Ashtabula
2 44081 Painesville
2 44092 Painesville
2 44095 Painesville
2 44124 Cleveland
2 44125 Cleveland
2 44254 Medina
2 44274 Medina
2 44431 Leetonia
2 44437 Youngstown
2 44440 Youngstown
2 44471 Youngstown
2 44504 Youngstown
2 44505 Youngstown
2 44617 Charm
2 44640 Canton
2 44652 Canton
2 44669 Canton
2 44675 Zoar
2 44699 Zoar
2 44735 Canton
2 44809 Tiffin
2 44866 Ashland
2 44870 Sandusky
2 45001 Cincinnati
2 45135 Hillsboro
2 45154 Hillsboro
2 45159 Hillsboro
2 45301 Beavercreek
2 45305 Beavercreek
2 45307 Beavercreek
2 45310 Burkettsville
2 45321 Eldorado
2 45330 Gratis
2 45332 Hollansburg
2 45345 Dayton
2 45352 Palestine
2 45358 Pitsburg
2 45368 Springfield
2 45378 Dayton
2 45405 Dayton
2 45426 Dayton
2 45430 Beavercreek
2 45433 Beavercreek
2 45446 Kettering
2 45616 Portsmouth
2 45630 Portsmouth
2 45634 Jackson
2 45636 Portsmouth
2 45652 Portsmouth
2 45653 Portsmouth
2 45659 Portsmouth
2 45662 Portsmouth
2 45663 Portsmouth
2 45677 Portsmouth
2 45679 Hillsboro
2 45682 Portsmouth
2 45684 Portsmouth
2 45693 West Union
2 45694 Portsmouth
2 45699 Portsmouth
2 45732 Athens
2 45804 Lima
2 45808 Lima
2 45809 Lima
2 45820 Lima
2 45832 Convoy
2 45849 Grover Hill
2 45877 Findlay
2 45883 St Henry
2 45890 Findlay
2 43008 Newark
1 43010 Springfield
1 43014 Ashland
1 43044 Springfield
1 43045 Marysville
1 43046 Newark
1 43056 Newark
1 43065 Columbus
1 43074 Delaware
1 43145 Williamsport
1 43148 Lancaster
1 43209 Columbus
1 43213 Columbus
1 43214 Columbus
1 43235 Columbus
1 43333 Lewistown
1 43359 Wharton
1 43407 Fremont
1 43414 Dunbridge
1 43447 Port Clinton
1 43464 Sandusky
1 43518 Edon
1 43716 Beallsville
1 43717 Belle Valley
1 43748 Junction City
1 43773 Quaker City
1 43906 Bellaire
1 43935 Martins Ferry
1 43942 Powhatan Point
1 44004 Ashtabula
1 44010 Ashtabula
1 44040 Cleveland
1 44048 Ashtabula
1 44070 Cleveland
1 44080 Parkman
1 44101 Cleveland
1 44102 Cleveland
1 44103 Cleveland
1 44104 Cleveland
1 44105 Cleveland
1 44108 Cleveland
1 44109 Cleveland
1 44110 Cleveland
1 44111 Cleveland
1 44112 Cleveland
1 44113 Cleveland
1 44115 Cleveland
1 44116 Cleveland
1 44117 Cleveland
1 44118 Cleveland
1 44119 Cleveland
1 44120 Cleveland
1 44121 Cleveland
1 44123 Cleveland
1 44126 Cleveland
1 44127 Cleveland
1 44129 Cleveland
1 44130 Cleveland
1 44132 Cleveland
1 44135 Cleveland
1 44136 Cleveland
1 44137 Cleveland
1 44140 Cleveland
1 44142 Cleveland
1 44144 Cleveland
1 44146 Cleveland
1 44147 Cleveland
1 44205 Norton
1 44214 Medina
1 44215 Medina
1 44235 Medina
1 44251 Medina
1 44258 Medina
1 44282 Wadsworth
1 44326 Akron
1 44403 Warren
1 44405 Youngstown
1 44417 Warren
1 44420 Warren
1 44424 Warren
1 44430 Warren
1 44439 Warren
1 44442 Youngstown
1 44443 Youngstown
1 44452 Youngstown
1 44454 Youngstown
1 44470 Warren
1 44485 Warren
1 44502 Youngstown
1 44503 Youngstown
1 44506 Youngstown
1 44507 Youngstown
1 44510 Youngstown
1 44511 Youngstown
1 44555 Youngstown
1 44613 Canton
1 44630 Canton
1 44643 Canton
1 44650 Maximo
1 44670 Canton
1 44702 Canton
1 44703 Canton
1 44704 Canton
1 44706 Canton
1 44708 Canton
1 44721 Canton
1 44817 Findlay
1 44818 Tiffin
1 44824 Sandusky
1 45132 Hillsboro
1 45142 Hillsboro
1 45155 Hillsboro
1 45172 Hillsboro
1 45177 Wilmington
1 45226 Cincinnati
1 45251 Cincinnati
1 45303 Ansonia
1 45315 Dayton
1 45316 Springfield
1 45324 Springfield
1 45350 North Star
1 45372 Springfield
1 45389 Christiansburg
1 45434 Beavercreek
1 45680 Ironton
1 45692 Wellston
1 45697 Hillsboro
1 45701 Athens
1 45716 Athens
1 45719 Athens
1 45735 Athens
1 45739 Athens
1 45742 Athens
1 45743 Long Bottom
1 45744 Lowell
1 45766 Athens
1 45776 Athens
1 45778 Athens
1 45780 Athens
1 45782 Athens
1 45816 Findlay
1 45826 Chickasaw
1 45839 Findlay
1 45858 Findlay
1 45872 Findlay
1 45881 Findlay
1