Copper Contamination

Copper in Ohio Drinking Water

Ranked by 90th percentile copper level (mg/L) · Data from EPA SDWIS & UCMR

407

Cities Tested

407

Exceeds Limit

100%

% Exceeds Limit

174.761 mg/L

State Avg

▼ 0% vs national

vs National

398

Health Violations

Analysis

Copper in Ohio: what the data shows

Ohio has 407 cities with copper monitoring data. The state average 90th percentile copper level is 174.761 mg/L, compared to 28.808 mg/L nationally — better than the national average. 407 cities exceed the EPA action level of 1.3 mg/L. Copper in drinking water typically comes from corrosion of copper pipes and plumbing fixtures, particularly in older homes. The EPA action level of 1.3 mg/L is the 90th percentile threshold — if more than 10% of tap samples exceed it, utilities must take corrective action including adjusting water chemistry to reduce corrosivity. Short-term copper exposure above the action level can cause gastrointestinal distress. Long-term exposure at elevated levels is associated with liver and kidney damage. Flushing your tap for 30 seconds before use and using an NSF 53-certified filter can reduce copper exposure.

Comparison

Cities exceeding 1.3 mg/L EPA Action Level

Ohio

100%

407 of 407 cities

← = Exactly at national rate

National avg

100%

3953 of 3953 cities

City Map

Copper data across Ohio

Each dot is a city, colored by overall water quality grade. Cities with copper levels above the 1.3 mg/L EPA action level are highlighted. Size reflects population served.

Worst Offenders

Top 10 cities by copper level in Ohio

Highest Copper levels (mg/L)

All Cities

All Ohio cities ranked by copper level

#	City	Level	Exceeds?	Violations	Grade
1	Archbold	1200.000 mg/L	Yes	16	B
2	Munroe Falls	1200.000 mg/L	Yes	0	A-
3	Fredericktown	1200.000 mg/L	Yes	0	B+
4	Xenia	1140.000 mg/L	Yes	1	A-
5	Spring Valley	1120.000 mg/L	Yes	0	A-
6	Botkins	1010.000 mg/L	Yes	10	B
7	Blacklick	990.000 mg/L	Yes	1	A-
8	Canal Winchester	962.000 mg/L	Yes	0	A-
9	Loveland	885.000 mg/L	Yes	0	B+
10	Mt Gilead	841.000 mg/L	Yes	2	B
11	New Carlisle	836.000 mg/L	Yes	5	B+
12	Anna	794.000 mg/L	Yes	24	B
13	Laings	740.000 mg/L	Yes	3	B+
14	North Lewisburg	737.000 mg/L	Yes	9	B+
15	Little Hocking	734.000 mg/L	Yes	0	B+
16	Deshler	730.000 mg/L	Yes	2	A-
17	Hudson	720.000 mg/L	Yes	1	B-
18	Racine	720.000 mg/L	Yes	2	A-
19	West Union	688.000 mg/L	Yes	3	B
20	Peebles	676.000 mg/L	Yes	0	B
21	Oak Harber	665.000 mg/L	Yes	2	B+
22	Creston	660.000 mg/L	Yes	2	B
23	Carlisle	618.000 mg/L	Yes	0	A-
24	Convoy	609.000 mg/L	Yes	0	B+
25	Lakemore	600.000 mg/L	Yes	0	B+
26	Millersburg	579.000 mg/L	Yes	4	B+
27	Killbuck	560.000 mg/L	Yes	1	B-
28	Frazeysburg	530.000 mg/L	Yes	0	B+
29	Pomeroy	529.000 mg/L	Yes	1	C
30	Hamler	520.000 mg/L	Yes	23	D
31	Pemberville	518.000 mg/L	Yes	1	B
32	Bryan	510.000 mg/L	Yes	1	B+
33	Ansonia	501.000 mg/L	Yes	6	B+
34	Franklin Furnace	491.000 mg/L	Yes	8	D
35	Hubbard	488.000 mg/L	Yes	1	B
36	Republic	480.000 mg/L	Yes	4	B
37	Columbus Grove	479.000 mg/L	Yes	5	B
38	Zanesville	470.000 mg/L	Yes	7	D+
39	Vienna	465.000 mg/L	Yes	9	B
40	Holgate	464.000 mg/L	Yes	15	C+
41	Newport	462.000 mg/L	Yes	1	B-
42	New Lebanon	458.000 mg/L	Yes	2	B+
43	Lucas	454.000 mg/L	Yes	0	B
44	Streetsboro	440.000 mg/L	Yes	1	A+
45	Gnadenhutten	423.000 mg/L	Yes	5	C
46	Athens	419.000 mg/L	Yes	4	B+
47	Butler	412.000 mg/L	Yes	0	B+
48	Batavia	407.000 mg/L	Yes	2	B+
49	Danville	398.000 mg/L	Yes	3	A-
50	Gallipolis	392.000 mg/L	Yes	3	B
51	St. Clairsville	380.000 mg/L	Yes	31	C
52	Kalida	380.000 mg/L	Yes	6	A-
53	Strasburg	374.000 mg/L	Yes	1	B+
54	St Henry	366.000 mg/L	Yes	0	A-
55	Berlin	364.000 mg/L	Yes	2	B
56	Alger	362.000 mg/L	Yes	6	C
57	Wadsworth	360.000 mg/L	Yes	0	B+
58	Washingtonville	350.000 mg/L	Yes	10	B
59	Bradner	340.000 mg/L	Yes	1	A-
60	Mcconnelsville	329.000 mg/L	Yes	3	B+
61	Wapakoneta	326.000 mg/L	Yes	7	B
62	Bluffton	324.200 mg/L	Yes	19	B+
63	Dunkirk	320.000 mg/L	Yes	4	B
64	Dayton	312.000 mg/L	Yes	43	F
65	Seven Mile	311.000 mg/L	Yes	0	B+
66	Geneva	310.000 mg/L	Yes	0	B+
67	Fairport Harbor	310.000 mg/L	Yes	1	B+
68	Navarre	305.000 mg/L	Yes	8	C+
69	Albany	291.000 mg/L	Yes	1	B-
70	Yorkville	282.000 mg/L	Yes	1	C
71	Oakwood	275.000 mg/L	Yes	10	C
72	Bowling Green	270.000 mg/L	Yes	85	F
73	Middleburg Heights	270.000 mg/L	Yes	2	A-
74	Brewster	268.000 mg/L	Yes	0	A
75	Wooster	264.000 mg/L	Yes	14	F
76	Perrysville	263.500 mg/L	Yes	3	B-
77	Trenton	261.000 mg/L	Yes	10	B-
78	Dover	261.000 mg/L	Yes	11	B
79	Lodi	260.000 mg/L	Yes	1	A-
80	Shiloh	260.000 mg/L	Yes	8	A-
81	Enon	256.000 mg/L	Yes	0	A-
82	Springboro	253.000 mg/L	Yes	4	B+
83	Ontario	253.000 mg/L	Yes	0	A-
84	Tallmadge	250.000 mg/L	Yes	1	B
85	Sycamore	250.000 mg/L	Yes	0	A-
86	Belpre	238.800 mg/L	Yes	4	B
87	West Unity	233.500 mg/L	Yes	0	B
88	Mount Gillead	230.000 mg/L	Yes	2	A
89	Eaton	229.000 mg/L	Yes	0	A-
90	Burton	226.000 mg/L	Yes	0	A-
91	Union	221.000 mg/L	Yes	2	B+
92	Milford Center	221.000 mg/L	Yes	1	A-
93	East Palestine	220.000 mg/L	Yes	0	A-
94	Huber Heights	218.000 mg/L	Yes	4	A-
95	Jamestown	218.000 mg/L	Yes	4	B
96	Eldorado	217.000 mg/L	Yes	0	A-
97	Marietta	216.000 mg/L	Yes	11	F
98	Spencerville	216.000 mg/L	Yes	5	A-
99	South Lebanon	210.000 mg/L	Yes	0	B+
100	Roaming Shores	210.000 mg/L	Yes	6	B+
101	Stow	209.000 mg/L	Yes	4	C+
102	Troy	202.900 mg/L	Yes	3	C
103	Sidney	201.500 mg/L	Yes	5	B+
104	Lowell	200.000 mg/L	Yes	6	B+
105	Beach City	200.000 mg/L	Yes	0	A
106	Sherwood	200.000 mg/L	Yes	0	B+
107	Sabina	197.000 mg/L	Yes	3	B-
108	Bellbrook	195.000 mg/L	Yes	2	B-
109	Washington Court House	195.000 mg/L	Yes	1	B+
110	Hillsboro	194.000 mg/L	Yes	8	B+
111	Massillon	193.000 mg/L	Yes	13	D+
112	Port Clinton	190.000 mg/L	Yes	46	D+
113	Piqua	190.000 mg/L	Yes	12	B
114	Minerva	190.000 mg/L	Yes	5	B+
115	Sardis	190.000 mg/L	Yes	0	B+
116	Ashtabula	188.500 mg/L	Yes	3	B+
117	Farmersville	188.000 mg/L	Yes	3	A-
118	Mount Sterling	186.000 mg/L	Yes	2	B+
119	Hebron	184.000 mg/L	Yes	0	A-
120	Payne	183.000 mg/L	Yes	1	B+
121	Cedarville	182.000 mg/L	Yes	1	B+
122	Garrettsville	180.000 mg/L	Yes	2	B-
123	Ashley	180.000 mg/L	Yes	5	A-
124	Gratis	180.000 mg/L	Yes	1	A-
125	Camden	179.000 mg/L	Yes	1	B+
126	Piketon	178.000 mg/L	Yes	8	C
127	Edgerton	175.000 mg/L	Yes	0	B+
128	Proctorville	174.000 mg/L	Yes	0	A
129	Miamisburg	172.000 mg/L	Yes	2	C
130	New Concord	172.000 mg/L	Yes	17	B+
131	Groveport	170.300 mg/L	Yes	1	A-
132	Maumee	169.500 mg/L	Yes	6	B-
133	Carey	169.000 mg/L	Yes	2	B+
134	Conneaut	168.000 mg/L	Yes	6	B+
135	Waynesfield	163.000 mg/L	Yes	4	B-
136	Baltimore	162.000 mg/L	Yes	1	B
137	Sugarcreek	162.000 mg/L	Yes	7	C+
138	Greenfield	161.000 mg/L	Yes	3	A-
139	Glenford	160.000 mg/L	Yes	3	B+
140	Jackson	160.000 mg/L	Yes	11	B-
141	Andover	160.000 mg/L	Yes	0	B-
142	West Farmington	160.000 mg/L	Yes	22	C-
143	Urbana	159.000 mg/L	Yes	24	C+
144	Circleville	157.500 mg/L	Yes	5	B
145	Criderville	157.000 mg/L	Yes	0	A-
146	Coshocton	156.500 mg/L	Yes	13	B+
147	Springfield	156.000 mg/L	Yes	42	F
148	Rushsylvania	156.000 mg/L	Yes	5	B-
149	Yellow Springs	155.000 mg/L	Yes	1	B+
150	Greenwich	155.000 mg/L	Yes	1	B-
151	Frankfort	155.000 mg/L	Yes	0	B+
152	Edon	155.000 mg/L	Yes	0	B+
153	Mcguffey	154.000 mg/L	Yes	3	B
154	Martins Ferry	153.000 mg/L	Yes	0	B
155	Malvern	153.000 mg/L	Yes	9	C-
156	Ney	153.000 mg/L	Yes	1	B-
157	Cortland	150.000 mg/L	Yes	1	B+
158	Rawson	150.000 mg/L	Yes	0	B+
159	Thurston	144.700 mg/L	Yes	0	B
160	Somerville	143.000 mg/L	Yes	2	A
161	Pleasant Hill	142.000 mg/L	Yes	0	A-
162	Sardinia	141.000 mg/L	Yes	19	B-
163	Bremen	139.000 mg/L	Yes	3	B+
164	Wakeman	139.000 mg/L	Yes	21	B+
165	White Cottage	137.000 mg/L	Yes	47	F
166	New Waterford	137.000 mg/L	Yes	11	C
167	Spencer	135.000 mg/L	Yes	0	A-
168	Franklin	134.000 mg/L	Yes	2	B+
169	Wayne	134.000 mg/L	Yes	0	B
170	Warsaw	133.000 mg/L	Yes	36	D+
171	South Charleston	131.000 mg/L	Yes	0	A-
172	Amherst	130.000 mg/L	Yes	0	B+
173	South Amherst	130.000 mg/L	Yes	15	B+
174	Millfield	129.000 mg/L	Yes	32	B+
175	Brookville	129.000 mg/L	Yes	2	B-
176	Rockford	128.000 mg/L	Yes	4	B-
177	Amanda	127.000 mg/L	Yes	0	A-
178	Chesterhill	125.500 mg/L	Yes	0	B+
179	Middletown	125.000 mg/L	Yes	0	A-
180	New Paris	124.000 mg/L	Yes	39	D+
181	Utica	124.000 mg/L	Yes	1	B
182	Tipp City	123.800 mg/L	Yes	0	C+
183	Addyston	122.000 mg/L	Yes	4	B
184	Toronto	121.000 mg/L	Yes	3	B
185	Coolville	121.000 mg/L	Yes	1	B-
186	North Hampton	120.000 mg/L	Yes	0	B
187	South Bloomfield	118.000 mg/L	Yes	7	B-
188	West Jefferson	116.000 mg/L	Yes	1	B+
189	Canal Fulton	115.000 mg/L	Yes	4	B
190	Middleport	115.000 mg/L	Yes	1	B
191	Stockport	115.000 mg/L	Yes	1	B-
192	Bellevue	112.000 mg/L	Yes	5	B
193	Medina	110.000 mg/L	Yes	15	C+
194	Huron	110.000 mg/L	Yes	13	C+
195	Brookfield	110.000 mg/L	Yes	5	A-
196	Sebring	108.000 mg/L	Yes	51	B-
197	New Holland	107.000 mg/L	Yes	0	A-
198	Bloomingburg	105.000 mg/L	Yes	5	A-
199	Thornville	104.500 mg/L	Yes	0	B+
200	Powhattan Point	104.000 mg/L	Yes	1	A-
201	Bellville	103.400 mg/L	Yes	9	C-
202	Oak Hill	101.000 mg/L	Yes	9	B-
203	Celina	100.000 mg/L	Yes	45	B-
204	Crestline	100.000 mg/L	Yes	0	B+
205	Shreve	100.000 mg/L	Yes	0	B+
206	Chauncey	100.000 mg/L	Yes	0	B+
207	Jefferson	99.000 mg/L	Yes	1	B
208	New Miami	99.000 mg/L	Yes	1	A-
209	Versailles	98.000 mg/L	Yes	4	B+
210	New Vienna	97.300 mg/L	Yes	3	A-
211	Wellston	97.000 mg/L	Yes	18	B
212	Philo	97.000 mg/L	Yes	2	B+
213	Arcanum	96.500 mg/L	Yes	1	B+
214	W Salem	95.000 mg/L	Yes	1	B
215	Windham	94.800 mg/L	Yes	1	B+
216	Morrow	94.500 mg/L	Yes	7	B-
217	Pataskala	93.700 mg/L	Yes	4	B+
218	Grand Rapids	93.000 mg/L	Yes	41	C
219	North Fairfield	93.000 mg/L	Yes	0	B+
220	Clarksville	91.600 mg/L	Yes	0	A-
221	Sheffield Lake	91.500 mg/L	Yes	0	B+
222	Avon Lake	90.800 mg/L	Yes	2	A-
223	Marysville	90.000 mg/L	Yes	16	B+
224	Delphos	89.500 mg/L	Yes	17	D+
225	Pleasantville	88.800 mg/L	Yes	0	A-
226	Seville	88.600 mg/L	Yes	3	B
227	Cleveland	87.300 mg/L	Yes	2	A-
228	Alliance	87.000 mg/L	Yes	17	B+
229	Ravenna	85.900 mg/L	Yes	3	C
230	Portsmouth	85.000 mg/L	Yes	1	B
231	Van Wert	83.000 mg/L	Yes	47	C
232	Arcadia	83.000 mg/L	Yes	23	C+
233	Willard	82.000 mg/L	Yes	1	B
234	Rittman	81.600 mg/L	Yes	12	B
235	West Alexandria	80.200 mg/L	Yes	4	B
236	Norton	80.000 mg/L	Yes	17	A-
237	Findlay	79.000 mg/L	Yes	6	A-
238	Fayetteville	78.700 mg/L	Yes	19	C+
239	Dennison	78.000 mg/L	Yes	13	A-
240	Germantown	77.800 mg/L	Yes	21	B+
241	Mcdonald	77.200 mg/L	Yes	1	B+
242	Mount Vernon	75.500 mg/L	Yes	3	B+
243	Gambier	73.000 mg/L	Yes	2	A-
244	Williamsport	72.000 mg/L	Yes	31	C-
245	Liberty Center	72.000 mg/L	Yes	35	A-
246	Akron	70.000 mg/L	Yes	36	D
247	Canton	69.500 mg/L	Yes	2	B-
248	Wellsville	69.400 mg/L	Yes	3	C+
249	Ironton	68.800 mg/L	Yes	12	C-
250	Lordstown	68.000 mg/L	Yes	2	B+
251	Girard	66.800 mg/L	Yes	0	B+
252	Bolivar	65.000 mg/L	Yes	11	C+
253	Lockbourne	65.000 mg/L	Yes	2	B
254	Mansfield	64.000 mg/L	Yes	37	F
255	Lyons	64.000 mg/L	Yes	31	B-
256	Lakeview	62.630 mg/L	Yes	1	B-
257	Youngstown	62.000 mg/L	Yes	3	C
258	Williamsburg	61.500 mg/L	Yes	6	B+
259	Beavercreek	61.200 mg/L	Yes	9	B+
260	Wauseon	61.000 mg/L	Yes	22	C+
261	Whitehouse	60.000 mg/L	Yes	8	B
262	Milford	60.000 mg/L	Yes	1	D
263	Clyde	60.000 mg/L	Yes	0	B+
264	South Point	60.000 mg/L	Yes	0	B+
265	Salem	59.500 mg/L	Yes	11	C+
266	Louisville	58.900 mg/L	Yes	9	C
267	Belle Center	57.000 mg/L	Yes	1	A-
268	Norwalk	52.900 mg/L	Yes	12	B+
269	Perrysburg	52.500 mg/L	Yes	4	C
270	Lima	52.300 mg/L	Yes	16	F
271	Lucasville	52.000 mg/L	Yes	3	A-
272	Newton Falls	52.000 mg/L	Yes	6	C
273	New Knoxville	51.610 mg/L	Yes	2	B-
274	Galion	51.000 mg/L	Yes	18	B-
275	Kent	50.000 mg/L	Yes	36	F
276	Kettering	50.000 mg/L	Yes	14	C
277	Barnesville	50.000 mg/L	Yes	14	C
278	Rossburg	50.000 mg/L	Yes	0	B+
279	Defiance	50.000 mg/L	Yes	171	F
280	Monroe	50.000 mg/L	Yes	2	B
281	Mcdermott	50.000 mg/L	Yes	2	A
282	Logan	50.000 mg/L	Yes	30	F
283	Reading	50.000 mg/L	Yes	3	B
284	Napoleon	50.000 mg/L	Yes	20	A-
285	Granville	50.000 mg/L	Yes	1	B
286	Ada	50.000 mg/L	Yes	2	B-
287	West Milton	50.000 mg/L	Yes	54	B+
288	Montpelier	50.000 mg/L	Yes	1	B+
289	Doylestown	50.000 mg/L	Yes	3	B-
290	Cadiz	50.000 mg/L	Yes	49	C-
291	Woodville	50.000 mg/L	Yes	1	B+
292	Middlefield	50.000 mg/L	Yes	14	B+
293	Gibsonburg	50.000 mg/L	Yes	1	B-
294	Leipsic	50.000 mg/L	Yes	6	B+
295	Forest	50.000 mg/L	Yes	2	B-
296	Green Springs	50.000 mg/L	Yes	16	B
297	Chesterland	50.000 mg/L	Yes	11	C-
298	Adena	50.000 mg/L	Yes	1	B-
299	New Straitsville	50.000 mg/L	Yes	1	B+
300	Lewisburg	49.900 mg/L	Yes	0	B
301	Trotwood	49.100 mg/L	Yes	1	B
302	Avon	49.000 mg/L	Yes	1	A-
303	St Marys	49.000 mg/L	Yes	1	B
304	Glendale	46.700 mg/L	Yes	0	A-
305	Columbus	46.000 mg/L	Yes	56	F
306	Somerset	46.000 mg/L	Yes	18	B+
307	Lakewood	45.400 mg/L	Yes	0	B+
308	Canfield	45.000 mg/L	Yes	0	B
309	Bexley	44.000 mg/L	Yes	16	C
310	New Philadelphia	40.000 mg/L	Yes	4	B
311	Fostoria	40.000 mg/L	Yes	32	F
312	Caldwell	40.000 mg/L	Yes	33	D
313	Belle Valley	40.000 mg/L	Yes	20	B
314	Malta	40.000 mg/L	Yes	15	B
315	Glouster	40.000 mg/L	Yes	3	B
316	Junction City	40.000 mg/L	Yes	0	A-
317	Oregon	38.000 mg/L	Yes	1	B+
318	Ottawa	38.000 mg/L	Yes	14	C+
319	Niles	37.000 mg/L	Yes	1	B
320	Reynoldsburg	36.800 mg/L	Yes	0	B+
321	Mcarthur	36.000 mg/L	Yes	0	B-
322	Warren	35.000 mg/L	Yes	62	F
323	Winesburg	35.000 mg/L	Yes	6	B-
324	Wilmington	34.000 mg/L	Yes	26	B
325	Lagrange	33.100 mg/L	Yes	10	C
326	Ripley	32.500 mg/L	Yes	1	A-
327	Wintersville	32.000 mg/L	Yes	0	B+
328	Berea	31.100 mg/L	Yes	1	B+
329	Westerville	31.000 mg/L	Yes	18	C+
330	Upper Sandusky	29.000 mg/L	Yes	3	A-
331	Lakeville	28.400 mg/L	Yes	4	B-
332	Cambridge	27.000 mg/L	Yes	86	C-
333	Painesville	26.600 mg/L	Yes	0	B+
334	Dalton	26.500 mg/L	Yes	4	B+
335	Delaware	26.000 mg/L	Yes	5	B
336	Chillicothe	26.000 mg/L	Yes	0	B+
337	Fremont	25.000 mg/L	Yes	44	B-
338	Bucyrus	25.000 mg/L	Yes	3	B
339	Mingo Junction	24.000 mg/L	Yes	3	B-
340	Marion	23.000 mg/L	Yes	9	B-
341	Newark	22.000 mg/L	Yes	6	B-
342	Struthers	21.100 mg/L	Yes	1	B+
343	North Ridgeville	21.000 mg/L	Yes	1	B
344	N Canton	21.000 mg/L	Yes	0	A-
345	Genoa	21.000 mg/L	Yes	5	B
346	Toledo	20.000 mg/L	Yes	13	B
347	Waterville	20.000 mg/L	Yes	0	B
348	Delta	20.000 mg/L	Yes	36	B-
349	Swanton	20.000 mg/L	Yes	20	A-
350	Mogadore	20.000 mg/L	Yes	9	B
351	Hamersville	19.400 mg/L	Yes	0	B+
352	Glandorf	19.000 mg/L	Yes	5	B
353	Norwood	18.300 mg/L	Yes	3	B+
354	Greenville	17.400 mg/L	Yes	4	A-
355	Hamilton	12.100 mg/L	Yes	5	B-
356	Lorain	10.000 mg/L	Yes	15	B+
357	Shelby	10.000 mg/L	Yes	19	B+
358	Columbiana	10.000 mg/L	Yes	2	B
359	Woodsfield	10.000 mg/L	Yes	14	B-
360	Carbon Hill	10.000 mg/L	Yes	0	B+
361	Coalton	10.000 mg/L	Yes	1	B
362	New Athens	10.000 mg/L	Yes	4	B+
363	Bradford	9.150 mg/L	Yes	28	C
364	Waverly	7.600 mg/L	Yes	4	C+
365	Shawnee	6.300 mg/L	Yes	2	A-
366	Lockland	5.000 mg/L	Yes	3	B+
367	Fredricktown	5.000 mg/L	Yes	2	C+
368	Coldwater	3.770 mg/L	Yes	1	A-
369	Put-In-Bay	3.066 mg/L	Yes	28	B-
370	Chardon	2.450 mg/L	Yes	25	F
371	Tiltonsville	2.090 mg/L	Yes	0	B+
372	Aurora	2.070 mg/L	Yes	0	A-
373	Cardington	1.990 mg/L	Yes	1	B+
374	Manchester	1.990 mg/L	Yes	1	C+
375	Pioneer	1.900 mg/L	Yes	3	B+
376	Rock Creek	1.900 mg/L	Yes	32	C-
377	Flushing	1.850 mg/L	Yes	0	B-
378	London	1.828 mg/L	Yes	10	B
379	Jackson Center	1.810 mg/L	Yes	1	B+
380	Rutland	1.767 mg/L	Yes	11	B-
381	Buckeye Lake	1.760 mg/L	Yes	2	B+
382	Paulding	1.730 mg/L	Yes	41	C+
383	Minster	1.720 mg/L	Yes	14	D
384	Mentor	1.700 mg/L	Yes	6	B-
385	Cuyahoga Falls	1.700 mg/L	Yes	3	B-
386	New Richmond	1.700 mg/L	Yes	0	B-
387	Rayland	1.660 mg/L	Yes	11	F
388	Steubenville	1.630 mg/L	Yes	30	F
389	Waterford	1.611 mg/L	Yes	5	C+
390	Russia	1.610 mg/L	Yes	0	A-
391	Walnut Creek	1.590 mg/L	Yes	3	B
392	New Lexington	1.560 mg/L	Yes	29	F
393	Chagrin Falls	1.529 mg/L	Yes	1	C
394	Hiram	1.500 mg/L	Yes	1	B+
395	Cincinnati	1.490 mg/L	Yes	10	F
396	Carrollton	1.490 mg/L	Yes	2	B-
397	Lebanon	1.470 mg/L	Yes	28	D
398	Gettysburg	1.470 mg/L	Yes	0	B+
399	Lancaster	1.460 mg/L	Yes	6	B+
400	Kelleys Island	1.460 mg/L	Yes	38	B+
401	Harrison	1.450 mg/L	Yes	5	A-
402	Vandalia	1.440 mg/L	Yes	10	B+
403	Obetz	1.440 mg/L	Yes	3	C-
404	Byesville	1.416 mg/L	Yes	79	D
405	Felicity	1.390 mg/L	Yes	5	A-
406	Pickerington	1.380 mg/L	Yes	1	A-
407	Covington	1.360 mg/L	Yes	0	A-

FAQ

Frequently asked questions about copper in Ohio

Is copper in Ohio drinking water safe?

407 cities in Ohio exceed the EPA action level of 1.3 mg/L for copper. The state average is 174.761 mg/L. Copper levels are highest in homes with copper plumbing, particularly when water sits in pipes overnight. Flushing the tap before use significantly reduces copper in drinking water.

What causes high copper levels in Ohio tap water?

Copper typically leaches from copper pipes and brass fittings within homes, not from the water source itself. Corrosive (low pH or soft) water accelerates this leaching. Water utilities with high copper readings are required to adjust water chemistry to reduce corrosivity. You can reduce exposure by flushing your tap for 30 seconds before use.

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