B68/100

Iowa Tap Water Quality Rankings 2026

268 cities · 2,762,707 people served

Top Contaminant Concerns

Copper (90th percentile)PFOAPFHxS

All Cities in Iowa

#	City	Score	Population	Violations
1	Des Moines	D (36)	253,620	39
2	Davenport	A (81)	147,720	4
3	Cedar Rapids	B (77)	141,831	8
4	Ames	A (81)	97,177	19
5	Iowa City	C (56)	95,437	72
6	Sioux City	F (0)	85,791	34
7	Ankeny	C (52)	78,007	60
8	Waterloo	B (60)	69,504	22
9	West Des Moines	A (98)	68,723	2
10	Council Bluffs	A (94)	64,447	3
11	Centerville	B (74)	60,024	87
12	Dubuque	A (94)	59,667	3
13	Newton	A (89)	55,370	17
14	Urbandale	A (98)	45,605	2
15	Ottumwa	B (70)	42,792	29
16	Marion	A (89)	42,628	7
17	Cedar Falls	B (79)	40,713	7
18	Creston	B (63)	38,079	58
19	Indianola	B (77)	35,928	15
20	Waukee	D (23)	31,823	25
21	Marshalltown	A (88)	30,444	17
22	Bouton	B (67)	29,057	50
23	Mason City	F (0)	27,338	142
24	Muscatine	A (82)	26,873	17
25	Spencer	A (88)	26,580	16
26	Tama	B (79)	26,305	51
27	Burlington	A (84)	26,015	2
28	Fort Dodge	B (79)	25,874	15
29	Johnston	B (61)	25,233	43
30	Clinton	A (93)	24,769	1
31	Oskaloosa	B (69)	23,994	46
32	Coralville	B (75)	22,318	15
33	North Liberty	A (81)	20,491	7
34	Altoona	C (59)	19,565	18
35	Clive	A (91)	19,010	5
36	Grimes	C (49)	15,392	15
37	Norwalk	A (88)	14,334	8
38	Knoxville	A (90)	14,087	5
39	Boone	C (54)	12,704	23
40	Clarinda	D (32)	12,253	84
41	Storm Lake	A (93)	11,431	4
42	Fort Madison	C (41)	11,087	32
43	Pella	F (0)	11,052	81
44	Grinnell	C (52)	10,864	45
45	Lemars	B (65)	10,571	16
46	Waverly	B (76)	10,394	5
47	Carroll	A (88)	10,184	1
48	Cherokee	A (93)	9,965	10
49	Keokuk	A (87)	9,900	7
50	Fairfield	D (25)	9,821	19
51	Bondurant	A (88)	9,393	5
52	Denison	A (94)	9,381	3
53	Mount Pleasant	B (66)	9,274	26
54	Eldridge	B (67)	9,115	19
55	May City	A (85)	9,114	7
56	Manning	B (79)	9,108	59
57	Sioux Center	A (94)	8,231	3
58	Perry	B (69)	7,836	16
59	Webster City	A (81)	7,825	7
60	Clear Lake	A (89)	7,687	8
61	Decorah	A (92)	7,615	5
62	Charles City	A (94)	7,446	3
63	Avoca	A (81)	7,387	18
64	Washington	C (59)	7,362	13
65	Atlantic	A (96)	7,252	1
66	Hiawatha	A (91)	7,183	1
67	Rock Rapids	A (81)	7,093	23
68	Nevada	C (43)	6,925	21
69	Polk City	A (88)	6,533	1
70	Adel	B (72)	6,461	12
71	Rock Valley	C (51)	6,289	32
72	Orange City	A (88)	6,267	4
73	Spirit Lake	B (77)	6,167	4
74	Maquoketa	F (0)	6,128	37
75	Independence	A (89)	6,064	4
76	Asbury	A (100)	5,943	0
77	Oelwein	A (81)	5,920	8
78	Estherville	A (96)	5,904	1
79	Anamosa	B (73)	5,687	23
80	Red Oak	F (16)	5,596	69
81	Dewitt	A (85)	5,514	4
82	Sheldon	A (85)	5,512	4
83	Osceola	F (13)	5,503	28
84	Algona	A (80)	5,487	9
85	Glenwood	F (19)	5,449	26
86	Winterset	F (0)	5,428	31
87	Ireton	B (68)	5,420	13
88	Iowa Falls	B (66)	5,146	7
89	Manchester	A (91)	5,077	2
90	Harlan	A (100)	5,067	0
91	Sergeant Bluff	A (81)	5,015	4
92	Vinton	B (77)	4,938	7
93	Shenandoah	B (73)	4,925	16
94	Humboldt	A (91)	4,792	2
95	Camanche	A (81)	4,570	16
96	Evansdale	A (93)	4,561	4
97	Mount Vernon	A (89)	4,527	8
98	Tiffin	A (87)	4,512	5
99	Dyersville	F (0)	4,477	42
100	Chariton	F (0)	4,381	97
101	Hampton	A (91)	4,337	2
102	Forest City	B (78)	4,285	3
103	Huxley	A (90)	4,244	3
104	Jefferson	B (73)	4,182	8
105	Carlisle	B (79)	4,170	10
106	Monticello	B (70)	4,040	11
107	Panora	F (13)	3,991	98
108	Cresco	A (83)	3,913	14
109	West Liberty	B (76)	3,858	8
110	Waukon	A (94)	3,827	3
111	Carter Lake	C (55)	3,791	18
112	Emmetsburg	A (83)	3,733	2
113	West Burlington	C (46)	3,728	11
114	Albia	C (54)	3,721	23
115	Osage	C (49)	3,637	12
116	Eagle Grove	A (96)	3,601	4
117	New Hampton	A (92)	3,494	5
118	Hospers	C (59)	3,428	14
119	Story City	A (94)	3,357	6
120	Williamsburg	B (63)	3,345	14
121	Milford	A (89)	3,321	8
122	Montezuma	A (91)	3,295	12
123	Tipton	A (96)	3,149	1
124	Madrid	A (85)	3,090	3
125	Garner	A (95)	3,065	2
126	Solon	A (83)	3,018	6
127	Wilton	A (94)	2,924	3
128	Onawa	A (96)	2,906	1
129	Sibley	A (86)	2,860	3
130	Fairfax	B (78)	2,828	7
131	Clarion	A (90)	2,810	3
132	Grundy Center	A (91)	2,796	2
133	Hawarden	C (54)	2,700	30
134	Missouri Valley	A (92)	2,684	5
135	Bloomfield	F (0)	2,682	87
136	Eldora	A (86)	2,664	3
137	Manly	A (91)	2,635	3
138	Kalona	A (86)	2,630	3
139	Center Point	A (98)	2,579	2
140	Hudson	A (94)	2,546	3
141	West Union	A (82)	2,540	3
142	Mitchellville	A (87)	2,515	9
143	Postville	A (90)	2,513	7
144	West Branch	B (76)	2,509	13
145	Jesup	B (79)	2,508	18
146	Belmond	A (85)	2,463	15
147	Marengo	B (69)	2,435	20
148	Ogden	B (64)	2,419	13
149	Toledo	C (50)	2,399	18
150	Cascade	A (88)	2,386	12
151	Hull	A (83)	2,384	2
152	Belle Plaine	B (72)	2,380	9
153	Bellevue	C (42)	2,363	11
154	Ely	A (91)	2,328	6
155	Colfax	B (70)	2,305	11
156	Laporte City	B (79)	2,284	10
157	Peosta	B (76)	2,278	17
158	Rockwell City	A (92)	2,250	5
159	Lisbon	C (57)	2,233	16
160	Greenfield	B (77)	2,227	8
161	Lake Mills	B (79)	2,158	6
162	Lamoni	C (51)	2,104	26
163	Wapello	B (79)	2,096	6
164	Alta	A (95)	2,087	1
165	Northwood	B (79)	2,072	9
166	Britt	A (98)	2,064	2
167	Sac City	A (98)	2,063	2
168	Mechanicsville	B (75)	2,059	31
169	Atkins	C (42)	2,056	31
170	Audubon	A (86)	2,053	3
171	Ida Grove	B (64)	2,051	17
172	Sumner	B (62)	2,030	38
173	Epworth	A (93)	2,023	4
174	Parkersburg	A (95)	2,019	2
175	Monroe	A (84)	2,007	5
176	Sigourney	A (95)	2,004	2
177	Denver	A (86)	1,919	3
178	New London	B (62)	1,910	11
179	Dallas Center	A (99)	1,901	1
180	Pocahontas	B (71)	1,877	6
181	Durant	A (85)	1,871	4
182	Columbus Junction	A (86)	1,830	6
183	Leon	F (0)	1,830	26
184	Guttenberg	A (82)	1,817	7
185	Stuart	F (8)	1,814	21
186	Farley	B (61)	1,766	8
187	Corning	F (0)	1,735	128
188	Lake City	C (50)	1,731	47
189	Manson	D (37)	1,709	32
190	Prairie City	A (81)	1,703	7
191	Mediapolis	B (70)	1,688	7
192	Moville	C (57)	1,687	20
193	Mount Ayr	F (0)	1,683	62
194	Remsen	B (70)	1,678	11
195	Pleasantville	A (90)	1,676	2
196	Gladbrook	A (86)	1,662	7
197	Granger	A (82)	1,654	6
198	Woodbine	B (70)	1,622	7
199	Corydon	F (0)	1,610	148
200	Hartley	A (100)	1,605	0
201	Guthrie Center	A (83)	1,593	2
202	Traer	A (89)	1,583	11
203	Akron	B (67)	1,558	14
204	Urbana	A (100)	1,554	0
205	Nashua	B (77)	1,551	20
206	Walcott	A (95)	1,551	5
207	Slater	B (70)	1,548	11
208	Oakland	A (95)	1,524	2
209	Wellman	F (0)	1,524	44
210	Bedford	F (0)	1,508	38
211	Brooklyn	A (83)	1,505	5
212	Holstein	C (58)	1,501	11
213	Monona	A (94)	1,471	3
214	Earlham	D (27)	1,446	22
215	State Center	C (53)	1,411	12
216	Palo	A (80)	1,407	9
217	Logan	A (91)	1,397	6
218	Kingsley	B (67)	1,396	10
219	Roland	B (71)	1,394	5
220	Sanborn	B (60)	1,392	32
221	Woodward	C (59)	1,346	14
222	Lenox	A (92)	1,339	5
223	Dike	B (76)	1,306	5
224	Laurens	A (98)	1,301	2
225	Coon Rapids	A (91)	1,300	1
226	Dysart	A (97)	1,281	3
227	Shell Rock	A (96)	1,269	1
228	Central City	B (74)	1,264	11
229	Fayette	A (96)	1,256	1
230	Alton	B (74)	1,248	11
231	Amana	A (82)	1,248	6
232	Elkader	B (72)	1,219	25
233	Jewell	A (86)	1,216	3
234	Melcher Dallas	B (78)	1,213	7
235	Gilbert	C (49)	1,211	39
236	Tripoli	A (87)	1,191	1
237	Buffalo	A (84)	1,176	12
238	Lake Park	B (75)	1,167	10
239	Springville	A (96)	1,164	4
240	St. Ansgar	B (78)	1,161	11
241	Strawberry Point	A (88)	1,155	5
242	Glidden	A (91)	1,151	6
243	Lake View	A (83)	1,133	10
244	Villisca	A (88)	1,132	5
245	Sheffield	B (74)	1,130	7
246	Aplington	B (75)	1,126	10
247	Calmar	B (74)	1,125	7
248	Mapleton	D (27)	1,124	22
249	Fairbank	C (58)	1,111	11
250	Arnolds Park	A (100)	1,110	0
251	Conrad	A (89)	1,098	4
252	Marcus	C (43)	1,079	14
253	George	F (0)	1,077	25
254	Sidney	B (65)	1,077	20
255	Van Meter	A (90)	1,074	10
256	Rockwell	B (70)	1,071	11
257	Elk Run Heights	A (91)	1,069	5
258	North English	A (85)	1,065	15
259	Riverside	A (91)	1,060	5
260	Treynor	A (82)	1,049	7
261	Malvern	B (65)	1,046	16
262	Sloan	A (90)	1,042	7
263	Dunlap	B (70)	1,035	15
264	Winfield	A (95)	1,035	5
265	Janesville	B (66)	1,034	11
266	Tabor	A (87)	1,014	5
267	Griswold	B (69)	1,008	12
268	Baxter	A (93)	1,002	7