Iowa Tap Water Quality Report

612 cities analyzed • 2,332,665 people served

Updated March 2026 • Data from EWG & EPA SDWIS

612

Cities Analyzed

8.9

Avg Above Guidelines

2,332,665

Total Population Served

Best Water Quality

Stacyville (0 above guidelines)

Most Concerns

Elk Run Heights (19 above guidelines)

Most Common Contaminants in Iowa

Contaminant	Found In	% of Cities
Chloroform carcinogen	533 of 612	87%
Total trihalomethanes (TTHMs) carcinogen	516 of 612	84%
Bromodichloromethane carcinogen	494 of 612	81%
Dichloroacetic acid carcinogen	466 of 612	76%
Dibromochloromethane carcinogen	464 of 612	76%
Trichloroacetic acid carcinogen	428 of 612	70%
Haloacetic acids (HAA5) carcinogen	416 of 612	68%
Nitrate carcinogen	407 of 612	67%
Dibromoacetic acid	384 of 612	63%
Fluoride	380 of 612	62%

City-by-City Water Quality Rankings

Ranked by number of contaminants above EWG health guidelines (most to fewest).

#	City	Detected	Above Guidelines	Above Legal	People Served
1	Waterloo	33	19	0	69,504
2	Elk Run Heights	33	19	0	1,069
3	Sioux City	40	18	1	85,791
4	Hudson	37	18	0	2,546
5	Davenport	23	15	0	147,720
6	Ankeny	33	15	0	68,090
7	Waukee	32	15	0	23,940
8	Muscatine	29	15	0	23,797
9	Tama	25	15	0	13,920
10	Keokuk	28	15	0	9,900
11	Rock Valley	21	15	0	4,059
12	Carter Lake	30	15	0	3,796
13	West Burlington	33	15	0	3,728
14	Brooklyn	26	15	0	1,505
15	Dysart	25	15	0	1,281
16	Malcom	26	15	0	270
17	Deep River	29	15	0	249
18	Chelsea	25	15	0	229
19	Clutier	25	15	0	213
20	Millersburg	25	15	0	135
21	Barnes City	26	15	0	0
22	West Des Moines	37	14	0	68,723
23	Dubuque	23	14	0	59,667
24	Burlington	28	14	1	26,015
25	Altoona	23	14	0	19,565
26	Oskaloosa	30	14	0	11,558
27	May City	26	14	0	6,940
28	Orange City	24	14	0	6,267
29	Harlan	18	14	0	5,067
30	Osage	16	14	0	3,637
31	Sibley	27	14	0	2,860
32	Lamoni	28	14	0	2,104
33	Sioux Rapids	20	14	0	920
34	Denver	25	14	0	548
35	Scranton	25	14	0	504
36	Little Rock	26	14	0	439
37	Ashton	26	14	0	436
38	Oto	22	14	0	72
39	Colfax	26	14	0	0
40	Buffalo	20	14	0	0
41	Baxter	28	14	0	0
42	Lake Park	29	14	0	0
43	Alton	24	14	0	0
44	Cedar Falls	26	13	0	40,713
45	Ottumwa	29	13	0	25,529
46	Bondurant	31	13	0	7,690
47	Red Oak	24	13	0	5,596
48	Carlisle	21	13	0	4,160
49	Epworth	23	13	0	2,023
50	Slater	22	13	0	1,548
51	Fairbank	25	13	0	1,111
52	Tabor	17	13	0	1,014
53	Adel	17	13	0	960
54	Readlyn	20	13	0	845
55	Mcgregor	20	13	0	747
56	Hedrick	26	13	0	728
57	Boyden	25	13	0	701
58	South English	26	13	0	252
59	Maharishi Vedic City	26	13	0	68
60	Ida Grove	23	13	0	0
61	Nashua	20	13	0	0
62	Shenandoah	20	13	0	0
63	Agency	27	13	0	0
64	Sutherland	20	13	0	0
65	Des Moines	29	12	0	245,123
66	Iowa City	22	12	0	68,753
67	Urbandale	29	12	0	45,600
68	Newton	24	12	0	37,820
69	Johnston	30	12	0	24,064
70	Coralville	18	12	0	22,318
71	Indianola	31	12	0	20,095
72	Clive	30	12	0	18,601
73	Norwalk	29	12	0	12,799
74	Boone	23	12	0	12,460
75	Lemars	23	12	0	10,571
76	Waverly	22	12	0	10,394
77	Hiawatha	18	12	0	7,183
78	Independence	18	12	0	6,064
79	Polk City	35	12	0	5,543
80	Vinton	23	12	0	4,938
81	Camanche	23	12	0	4,570
82	Jefferson	23	12	0	4,182
83	Manning	21	12	0	3,573
84	Hospers	25	12	0	3,400
85	Cherokee	20	12	0	3,315
86	Madrid	20	12	0	2,802
87	Jesup	22	12	0	2,508
88	Monroe	24	12	0	2,007
89	Sigourney	13	12	0	2,004
90	Montezuma	26	12	0	1,700
91	Remsen	18	12	0	1,678
92	State Center	18	12	0	1,411
93	Sanborn	18	12	0	1,392
94	Aplington	20	12	0	1,126
95	Odebolt	20	12	0	994
96	Larchwood	17	12	0	926
97	Neola	20	12	0	918
98	Sully	24	12	0	881
99	Melbourne	24	12	0	786
100	Gilman	24	12	0	542
101	Spillville	19	12	0	385
102	Lynnville	24	12	0	380
103	Pleasant Hill	30	12	0	350
104	Brandon	20	12	0	341
105	Williams	19	12	0	315
106	Ridgeway	23	12	0	275
107	Rhodes	24	12	0	271
108	Mallard	15	12	1	257
109	Riverton	14	12	0	250
110	Luxemburg	20	12	0	245
111	Halbur	21	12	0	243
112	Laurel	24	12	0	220
113	Pilot Mound	16	12	0	163
114	Gilbertville	23	12	0	0
115	Galva	20	12	0	0
116	Colo	25	12	0	0
117	Pocahontas	20	12	0	0
118	Hawarden	17	12	0	0
119	Castana	21	12	0	0
120	Linn Grove	15	12	0	0
121	Conrad	24	12	0	0
122	Pomeroy	17	12	0	0
123	Dedham	22	12	0	0
124	Irwin	22	12	0	0
125	Clemons	25	12	0	0
126	Denison	24	12	0	0
127	Paullina	23	12	0	0
128	Ute	17	12	0	0
129	Beaman	25	12	0	0
130	Collins	24	12	0	0
131	Granville	25	12	0	0
132	Maxwell	21	12	0	0
133	Montour	24	12	0	0
134	Council Bluffs	21	11	0	64,447
135	Spencer	20	11	0	11,325
136	Pella	23	11	0	11,052
137	Carroll	24	11	0	10,321
138	Grinnell	23	11	0	9,564
139	Sioux Center	19	11	0	8,231
140	Perry	21	11	0	7,836
141	Estherville	12	11	0	5,904
142	Winterset	17	11	0	5,428
143	Iowa Falls	14	11	0	5,106
144	Dyersville	23	11	0	4,477
145	Avoca	15	11	0	4,250
146	Huxley	19	11	0	4,244
147	Clarinda	12	11	0	3,225
148	Rock Rapids	19	11	0	2,611
149	West Branch	14	11	0	2,509
150	Marengo	13	11	0	2,435
151	Toledo	21	11	0	2,369
152	Dallas Center	13	11	0	1,901
153	Leon	19	11	0	1,822
154	Corning	23	11	0	1,735
155	Mediapolis	21	11	0	1,688
156	Hartley	19	11	0	1,605
157	Guthrie Center	19	11	0	1,593
158	Traer	19	11	0	1,583
159	Corydon	24	11	0	1,526
160	Monona	21	11	0	1,471
161	Earlham	22	11	0	1,420
162	Shellsburg	19	11	0	1,407
163	Logan	14	11	0	1,397
164	Nora Springs	21	11	0	1,369
165	Lake View	19	11	0	1,133
166	Sloan	15	11	0	1,042
167	Janesville	24	11	0	1,034
168	Lansing	20	11	0	983
169	Legrand	25	11	0	905
170	Gladbrook	25	11	0	799
171	West Bend	24	11	0	791
172	Milo	22	11	0	788
173	Wheatland	13	11	0	775
174	Decorah	19	11	0	775
175	Wall Lake	17	11	0	755
176	Grand Junction	13	11	0	725
177	Oxford	15	11	0	722
178	Wellsburg	24	11	0	720
179	Elgin	12	11	0	685
180	Moravia	23	11	0	637
181	Seymour	23	11	0	637
182	Kellogg	21	11	0	617
183	Moulton	23	11	0	607
184	Elk Horn	15	11	0	601
185	Everly	16	11	0	575
186	Zearing	25	11	0	528
187	Truro	22	11	0	525
188	Humeston	23	11	0	522
189	New Virginia	22	11	0	498
190	Garwin	25	11	0	481
191	Russell	23	11	0	477
192	Batavia	22	11	0	430
193	Martensdale	21	11	0	421
194	Earling	15	11	0	397
195	Washinginton	24	11	0	390
196	Livermore	16	11	0	383
197	New Vienna	20	11	0	382
198	Massena	14	11	0	364
199	Pierson	20	11	0	337
200	Mystic	22	11	0	322
201	Rockwell City	18	11	0	300
202	Milton	23	11	0	264
203	Defiance	19	11	0	250
204	Lineville	22	11	0	243
205	Panama	15	11	0	235
206	Allerton	24	11	0	179
207	Wallingford	12	11	0	165
208	Bristow	19	11	0	145
209	Superior	17	11	0	132
210	Saint Charles	21	11	0	108
211	Clayton	19	11	0	45
212	Chariton	23	11	0	0
213	Blakesburg	22	11	0	0
214	Grundy Center	24	11	0	0
215	Kingsley	18	11	0	0
216	Albia	24	11	0	0
217	Elma	12	11	0	0
218	Preston	20	11	0	0
219	Inwood	23	11	0	0
220	Gilmore City	18	11	0	0
221	Akron	20	11	0	0
222	Cincinnati	22	11	0	0
223	Cantril	23	11	0	0
224	Dike	24	11	0	0
225	Hanlontown	20	11	0	0
226	Onawa	19	11	0	0
227	Atlantic	17	11	0	0
228	Templeton	21	11	0	0
229	Lester	18	11	0	0
230	Keosauqua	24	11	0	0
231	Doon	23	11	0	0
232	Brayton	15	11	0	0
233	Exira	15	11	0	0
234	Lovilia	23	11	0	0
235	Alvord	23	11	0	0
236	Holstein	12	11	0	0
237	Bloomfield	22	11	0	0
238	Bancroft	14	11	0	0
239	Centerville	21	10	0	32,000
240	Mason City	19	10	0	27,338
241	Spirit Lake	18	10	0	6,167
242	Sheldon	14	10	0	5,512
243	Osceola	17	10	0	5,503
244	Sergeant Bluff	14	10	0	5,015
245	Monticello	12	10	0	4,040
246	Eldora	11	10	0	2,663
247	West Union	13	10	0	2,540
248	Mitchellville	17	10	0	2,515
249	Ogden	13	10	0	2,419
250	Bellevue	22	10	0	2,363
251	Greenfield	16	10	0	2,227
252	Alta	18	10	0	2,087
253	Sumner	14	10	0	2,030
254	Parkersburg	19	10	0	2,019
255	New London	20	10	0	1,910
256	Stuart	14	10	0	1,814
257	Prairie City	13	10	0	1,703
258	Woodbine	15	10	0	1,622
259	Woodward	13	10	0	1,346
260	Shell Rock	19	10	0	1,268
261	Fayette	19	10	0	1,256
262	Glidden	12	10	0	1,151
263	Villisca	21	10	0	1,132
264	Sheffield	16	10	0	1,130
265	George	11	10	0	1,077
266	Allison	18	10	0	966
267	Primghar	18	10	0	896
268	Whittemore	13	10	0	875
269	Victor	18	10	0	875
270	Cambridge	14	10	0	827
271	Fontanelle	17	10	0	676
272	Goldfield	11	10	0	622
273	Clermont	11	10	0	586
274	New Hartford	13	10	0	570
275	Ocheyedan	11	10	0	439
276	Delhi	20	10	0	420
277	Worthington	19	10	0	382
278	Churdan	17	10	0	375
279	Kelley	18	10	0	304
280	Amana	12	10	0	300
281	Salem	21	10	0	272
282	Harvey	17	10	0	236
283	Renwick	12	10	0	234
284	Randolph	11	10	0	189
285	Randall	13	10	0	154
286	Geneva	11	10	0	136
287	Somers	11	10	0	128
288	Battle Creek	15	10	0	0
289	Lenox	21	10	0	0
290	Rolfe	24	10	0	0
291	Tripoli	18	10	0	0
292	Central City	17	10	0	0
293	Blairstown	18	10	0	0
294	Floyd	22	10	0	0
295	Algona	13	10	0	0
296	Fonda	18	10	0	0
297	Early	16	10	0	0
298	Wapello	17	10	0	0
299	Birmingham	21	10	0	0
300	Audubon	16	10	0	0
301	Farragut	13	10	0	0
302	Charter Oak	13	10	0	0
303	Garnavillo	18	10	0	0
304	Donnellson	16	10	0	0
305	Northwood	13	10	0	0
306	Fort Dodge	18	9	0	25,874
307	Creston	21	9	0	19,488
308	Storm Lake	23	9	0	11,431
309	Bouton	13	9	0	9,447
310	Ireton	19	9	0	5,170
311	Manchester	11	9	0	5,065
312	Humboldt	12	9	0	4,792
313	Hampton	15	9	0	4,337
314	Waukon	12	9	0	3,827
315	Emmetsburg	17	9	0	3,706
316	Williamsburg	12	9	0	3,345
317	Milford	16	9	0	3,321
318	Solon	11	9	0	3,018
319	Hull	11	9	0	2,384
320	Peosta	16	9	0	2,278
321	Guttenberg	20	9	0	1,817
322	Mount Ayr	22	9	0	1,683
323	Granger	11	9	0	1,654
324	Walcott	9	9	0	1,551
325	Winfield	11	9	0	1,035
326	Lawton	11	9	0	943
327	Van Horne	17	9	0	881
328	Dunkerton	21	9	0	842
329	Schleswig	11	9	0	830
330	Glenwood	12	9	0	823
331	Rockford	15	9	0	758
332	Redfield	13	9	0	744
333	Shelby	12	9	0	727
334	Murray	21	9	0	684
335	Radcliffe	11	9	0	561
336	Thompson	12	9	0	499
337	Marquette	17	9	0	429
338	Oxford Junction	11	9	0	424
339	Vail	21	9	0	396
340	Plainfield	15	9	0	393
341	Diagonal	21	9	0	344
342	Westside	20	9	0	285
343	Macedonia	9	9	0	275
344	Auburn	18	9	0	265
345	Maurice	19	9	0	265
346	Lu Verne	10	9	0	258
347	Cumberland	13	9	0	256
348	Leland	13	9	0	255
349	Quimby	17	9	0	249
350	Hancock	12	9	0	200
351	Lidderdale	20	9	0	166
352	Woolstock	11	9	0	144
353	Monmouth	11	9	0	129
354	Craig	20	9	0	79
355	Swan	12	9	0	76
356	Mapleton	11	9	0	0
357	Correctionville	17	9	0	0
358	Bedford	23	9	0	0
359	Roland	13	9	0	0
360	Hamburg	11	9	0	0
361	Manilla	14	9	0	0
362	Deloit	9	9	0	0
363	Dakota City	14	9	0	0
364	Nevada	11	9	0	0
365	Swea City	10	9	0	0
366	Kanawha	11	9	0	0
367	Fenton	12	9	0	0
368	Marathon	12	9	0	0
369	Elkader	13	9	0	0
370	Lakota	10	9	0	0
371	Carson	12	9	0	0
372	Wilton	12	9	0	0
373	Alden	13	9	0	0
374	Pacific Junction	11	9	0	0
375	Anita	10	9	0	0
376	Essex	13	9	0	0
377	Kiron	11	9	0	0
378	Lytton	11	9	0	0
379	Merrill	14	9	0	0
380	Anthon	12	9	0	0
381	Story City	11	9	0	0
382	Cedar Rapids	21	8	0	141,420
383	Fort Madison	14	8	0	11,087
384	Maquoketa	11	8	0	6,128
385	Asbury	9	8	0	5,943
386	Knoxville	12	8	0	5,687
387	Evansdale	20	8	0	4,561
388	Mount Vernon	14	8	0	4,527
389	Eagle Grove	9	8	0	3,601
390	Belmond	9	8	0	2,463
391	Eldridge	11	8	0	2,389
392	Columbus Junction	10	8	0	1,830
393	Urbana	18	8	0	1,554
394	Oakland	11	8	0	1,524
395	St. Ansgar	10	8	0	1,161
396	Riverside	11	8	0	1,060
397	Aurelia	17	8	0	968
398	Gowrie	9	8	0	952
399	West Point	15	8	0	921
400	Ossian	16	8	0	802
401	Okoboji	15	8	0	768
402	Montrose	13	8	0	738
403	Stanton	11	8	0	683
404	Olin	12	8	0	651
405	Dexter	12	8	0	640
406	Farmington	14	8	0	579
407	Wyoming	11	8	0	523
408	Dows	12	8	0	521
409	Dow City	8	8	0	485
410	Casey	12	8	0	387
411	New Market	11	8	0	385
412	Duncombe	9	8	0	384
413	Plymouth	10	8	0	378
414	Orient	9	8	0	368
415	Lacona	14	8	0	361
416	Middletown	12	8	0	336
417	Peterson	14	8	0	322
418	Sheldahl	12	8	0	307
419	Newell	10	8	0	295
420	Yale	12	8	0	267
421	Oakville	12	8	0	200
422	Stout	8	8	0	191
423	Shambaugh	12	8	1	159
424	Swaledale	10	8	0	144
425	Ft Dodge	12	8	0	136
426	Kansas City	11	8	0	100
427	Morley	16	8	0	98
428	Alta Vista	8	8	0	55
429	St. Olaf	13	8	0	27
430	Corwith	8	8	0	0
431	Dunlap	9	8	0	0
432	Washta	16	8	0	0
433	Center Point	20	8	0	0
434	Danbury	8	8	0	0
435	Whiting	12	8	0	0
436	Calmar	13	8	0	0
437	Lost Nation	10	8	0	0
438	Grafton	13	8	0	0
439	Laurens	14	8	0	0
440	Emerson	12	8	0	0
441	Wayland	9	8	0	0
442	Adair	17	8	0	0
443	Arnolds Park	13	8	0	0
444	Mount Pleasant	16	8	1	0
445	Melcher Dallas	16	8	0	0
446	Pleasantville	17	8	0	0
447	Coon Rapids	14	8	0	0
448	Hinton	8	8	0	0
449	Arlington	16	8	0	0
450	Garner	11	8	0	0
451	Klemme	13	8	0	0
452	Van Meter	11	8	0	0
453	Webster City	11	7	0	7,825
454	Postville	12	7	0	2,503
455	Moville	7	7	0	1,687
456	North English	10	7	0	1,065
457	Treynor	9	7	0	1,049
458	Eddyville	7	7	0	1,029
459	Griswold	11	7	0	1,017
460	Greene	16	7	0	990
461	Princeton	10	7	0	923
462	Winthrop	15	7	0	840
463	Riceville	17	7	0	816
464	Ruthven	10	7	0	779
465	Schaller	18	7	0	729
466	Earlville	7	7	0	724
467	Badger	11	7	0	561
468	Ainsworth	12	7	0	511
469	Maynard	15	7	0	476
470	Hawkeye	14	7	0	438
471	New Albin	14	7	0	432
472	Lewis	7	7	0	357
473	Elliott	8	7	0	345
474	Terril	9	7	0	334
475	Marble Rock	12	7	0	271
476	Protivin	17	7	0	269
477	Wadena	12	7	0	209
478	Jamaica	10	7	0	195
479	Westgate	9	7	0	192
480	Mechanicsville	9	7	0	0
481	Durant	11	7	0	0
482	Fertile	7	7	0	0
483	New Hampton	11	7	0	0
484	Lime Springs	9	7	0	0
485	Atkins	12	7	0	0
486	Palmer	10	7	0	0
487	Kensett	10	7	0	0
488	Alburnett	18	7	0	0
489	Little Sioux	11	7	0	0
490	Soldier	7	7	0	0
491	Jewell	10	7	0	0
492	Ames	14	6	0	55,177
493	West Liberty	8	6	0	3,858
494	Clarion	10	6	0	2,810
495	Laporte City	7	6	0	2,284
496	Reinbeck	14	6	0	1,662
497	Sidney	10	6	0	1,070
498	Graettinger	7	6	0	897
499	Keota	7	6	0	897
500	Walnut	8	6	0	747
501	Ventura	11	6	0	716
502	Grand Mound	7	6	0	615
503	Norway	8	6	0	466
504	Grandview	9	6	0	437
505	Holy Cross	9	6	0	356
506	Manly	9	6	0	222
507	Smithland	10	6	0	181
508	Keystone	16	6	0	0
509	Moorhead	9	6	0	0
510	Hornick	9	6	0	0
511	Clarence	8	6	0	0
512	Pisgah	13	6	0	0
513	Ellsworth	8	6	0	0
514	North Liberty	10	5	0	20,491
515	Clear Lake	8	5	0	7,777
516	Panora	7	5	0	2,900
517	Ely	8	5	0	2,328
518	Sac City	17	5	0	2,063
519	Wellman	9	5	0	1,524
520	Volga	7	5	0	203
521	Vincent	7	5	0	181
522	Rowan	10	5	0	121
523	Miles	6	5	0	109
524	Springville	13	5	0	85
525	Forest City	6	5	0	0
526	Britt	8	5	0	0
527	Blencoe	7	5	0	0
528	Sabula	9	5	0	0
529	Bode	8	5	0	0
530	Charles City	14	4	0	7,448
531	Washington	7	4	0	7,352
532	Lake Mills	8	4	0	2,158
533	Farley	15	4	0	1,766
534	Dumont	8	4	0	1,269
535	Anamosa	5	4	0	1,230
536	Edgewood	13	4	0	909
537	Hubbard	7	4	0	860
538	Calamus	6	4	0	156
539	Varina	9	4	0	68
540	Breda	5	4	0	0
541	Cresco	5	4	0	0
542	Manson	6	4	0	0
543	Olds	5	4	0	0
544	Marcus	11	4	0	0
545	Marion	12	3	0	41,623
546	Marshalltown	9	3	0	27,591
547	Grimes	9	3	0	15,392
548	Strawberry Point	6	3	0	1,155
549	Lawler	4	3	0	406
550	Fort Atkinson	14	3	0	365
551	Rudd	9	3	0	358
552	Ryan	6	3	0	350
553	Kimballton	5	3	0	287
554	Springbrook	10	3	0	143
555	Hazleton	6	3	0	90
556	Goodell	7	3	0	0
557	Titonka	6	3	0	0
558	Ringsted	6	3	0	0
559	Dewitt	5	2	0	5,514
560	Leclaire	4	2	0	860
561	Morning Sun	7	2	0	752
562	Stratford	3	2	0	707
563	Coggon	2	2	0	701
564	Walker	2	2	0	688
565	Hopkinton	10	2	0	622
566	Walford	2	2	0	413
567	Colesburg	2	2	0	386
568	Tipton	2	2	0	340
569	Luana	10	2	0	301
570	Coulter	5	2	0	219
571	West Chester	7	2	0	144
572	Wiota	3	2	0	95
573	Fredericksburg	10	2	0	78
574	Belle Plaine	3	2	0	28
575	Vermillion	4	2	0	25
576	Fairfax	4	2	0	25
577	Stanwood	4	2	0	0
578	Burt	5	2	0	0
579	Woden	6	2	0	0
580	Bronson	7	2	0	0
581	Lowden	6	2	0	0
582	Fairfield	2	1	0	9,416
583	Oelwein	4	1	0	5,920
584	Tiffin	4	1	0	4,512
585	Rockwell	4	1	0	1,071
586	Brighton	2	1	0	584
587	Lamont	2	1	0	429
588	Harcourt	4	1	0	265
589	Goose Lake	2	1	0	239
590	Blue Grass	3	1	0	209
591	Missouri Valley	1	1	0	190
592	Prairieburg	3	1	0	160
593	Swisher	3	1	0	134
594	New Providence	3	1	0	100
595	Long Grove	1	1	0	83
596	Bettendorf	4	1	0	80
597	Oviedo	3	1	0	72
598	Kalona	3	1	0	67
599	Lisbon	3	1	0	60
600	Seattle	3	1	0	60
601	Le Claire	1	1	0	57
602	New Liberty	2	1	0	48
603	De Witt	3	1	0	25
604	Wesley	2	1	0	0
605	Hills	2	1	0	0
606	Magnolia	1	1	0	0
607	Cascade	2	1	0	0
608	Bernard	2	1	0	0
609	Stacyville	2	0	0	465
610	Stanhope	4	0	0	364
611	Low Moor	7	0	0	250
612	Los Angeles	2	0	0	245

Recommended Filtration for Iowa

Based on the most common contaminants found across Iowa (Chloroform, Total trihalomethanes (TTHMs), Bromodichloromethane), we recommend a reverse osmosis system or high-quality carbon block filter to remove disinfection byproducts and their precursors.

Echo RO System

Removes up to 99.9% of contaminants. The gold standard for drinking water in Iowa homes.

View RO Systems

Echo Whole-Home Filter

Protect every tap in your home from chlorine, VOCs, and disinfection byproducts.

View Whole-Home Filters

Echo Hydrogen Water Flask

Once your water is clean, supercharge it with molecular hydrogen for antioxidant and anti-inflammatory benefits.

Shop Hydrogen Flask

Frequently Asked Questions

Is Iowa tap water safe to drink?

Water quality varies significantly across Iowa. Of the 612 cities analyzed, the average city has 8.9 contaminants above EWG health guidelines. The best water quality was found in Stacyville. We recommend checking your specific city's report for detailed information.

What city has the best water in Iowa?

Based on our analysis, Stacyville has the fewest contaminants above EWG health guidelines in Iowa, with 0 above guideline levels.

What city has the worst water in Iowa?

Based on our analysis, Elk Run Heights has the most contaminants above EWG health guidelines in Iowa, with 19 above guideline levels.

What's the best water filter for Iowa residents?

For most Iowa households, we recommend a reverse osmosis (RO) system for drinking water and a whole-home filter for showers and baths. The specific recommendation depends on your city's contaminant profile — check your city's report for personalized guidance.

National Water Quality Reports

Data sources: Environmental Working Group (EWG) Tap Water Database, U.S. EPA Safe Drinking Water Information System (SDWIS)

Last updated: March 2026

Methodology: Contaminant levels are compared against both EPA legal limits (Maximum Contaminant Levels) and EWG health guidelines, which are often stricter and based on the latest scientific research.

Iowa Water Quality Report (2026)