STATE REPORT ID 1 ALERT 278 HEALTH VIOLATIONS

Idaho Water Quality: 1.7K Violations in 324 ZIP Codes

Name: Water Quality Data for Idaho
Creator: ZipCheckup
Published: 2026-06-03
License: https://creativecommons.org/licenses/by/4.0/

324 ZIP codes · 423 water systems · UPC plumbing code · Updated 2026-06-03

Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-06-03

324

ZIP Codes

423

Water Systems

222

ZIPs with Violations

Active Alerts

UPC

Plumbing Code

C · 66

Avg Safety Score

ZIPs Exceeding Lead Limit

45%

High Radon Risk (Zone 1)

#24

of 51 States

44%

ZIPs Rated A or B

69%

ZIPs with Violations

Idaho average: 66/100 — ranked #24 of 51 states. 1 points below the national average (67). 69% of ZIP codes have recorded violations.

Water monitoring data from Idaho utilities shows a below-average aggregate record — compliance gaps appear across multiple counties and utility districts, and the state's overall grade reflects a recurring pattern of health-based violations rather than isolated incidents in a single region.

Score Distribution

How Idaho's 324 ZIP codes are distributed across safety grades.

130

105

85-10070-8455-6940-540-39

Home Safety Scores by State

F (0-49) D (50-64) C (65-74) B (75-84) A (85+)

Data: EPA SDWIS, FEMA NFIP, EPA Radon, USGS Earthquake Hazards, NIFC Wildfire • 2026-06-03

Top 10 Safest ZIP Codes in Idaho

Highest Home Safety Scores in the state.

#	ZIP Code	City	County	Score	Grade
1	83543	Nezperce	Lewis	98	A
2	83555	Winchester	Lewis	98	A
3	83523	Craigmont	Lewis	97	A
4	83501	Lewiston	Nez Perce	94	A
5	83540	Lapwai	Nez Perce	94	A
6	83548	Reubens	Nez Perce	94	A
7	83617	Emmett	Gem	94	A
8	83524	Culdesac	Nez Perce	91	A
9	83545	Peck	Nez Perce	91	A
10	83654	New Meadows	Adams	89	A

10 Lowest-Scoring ZIP Codes in Idaho

#	ZIP Code	City	County	Score	Grade	Violations
1	83535	Juliaetta	Latah	12	F	12
2	83633	King Hill	Elmore	33	F	11
3	83525	Elk City	Idaho	38	F	11
4	83868	Smelterville	Shoshone	40	D	0
5	83866	Santa	Benewah	40	D	0
6	83865	Colburn	Bonner	40	D	0
7	83853	Porthill	Boundary	40	D	0
8	83848	Nordman	Bonner	40	D	0
9	83847	Naples	Boundary	40	D	0
10	83840	Kootenai	Bonner	40	D	0

County Rankings

Water quality breakdown by county. 43 counties with data in Idaho.

Loading county map…

F (0-49) D (50-64) C (65-74) B (75-84) A (85+)

County-level aggregation of ZIP code safety scores • EPA SDWIS, FEMA NFIP, EPA Radon, USGS, NIFC

County	Avg Score	Grade	ZIPs	Best ZIP	Worst ZIP
Bannock	79	B	11	83202 (83)	83214 (59)
Elmore	50	D	7	83647 (65)	83633 (33)
Bingham	71	B	9	83210 (83)	83277 (49)
Power	61	C	4	83271 (81)	83243 (53)
Butte	65	C	3	83244 (66)	83255 (64)
Caribou	64	C	6	83241 (82)	83285 (53)
Bear Lake	69	C	9	83223 (83)	83272 (53)
Custer	49	D	6	83251 (70)	83278 (40)
Franklin	76	B	7	83286 (83)	83281 (63)
Lemhi	46	D	9	83462 (53)	83468 (40)
Twin Falls	76	B	9	83302 (83)	83344 (55)
Cassia	71	B	6	83311 (81)	83342 (53)
Blaine	60	C	7	83354 (65)	83340 (44)
Gooding	64	C	4	83355 (70)	83314 (60)
Camas	47	D	3	83327 (61)	83337 (40)
Lincoln	81	B	3	83352 (83)	83349 (79)
Jerome	81	B	3	83335 (83)	83325 (77)
Minidoka	73	B	4	83347 (79)	83343 (62)
Bonneville	71	B	13	83454 (82)	83428 (53)
Fremont	56	C	8	83420 (69)	83433 (40)
Teton	74	B	4	83455 (82)	83424 (53)
Clark	53	D	2	83423 (65)	83446 (40)
Jefferson	69	C	6	83435 (81)	83425 (53)
Madison	82	B	4	83440 (82)	83448 (81)
Nez Perce	91	A	6	83501 (94)	83541 (84)
Clearwater	57	C	5	83553 (66)	83546 (41)
Idaho	56	C	13	83539 (66)	83525 (38)
Lewis	98	A	3	83543 (98)	83523 (97)
Latah	59	C	12	83537 (70)	83535 (12)
Boise	47	D	8	83622 (64)	83670 (40)
Owyhee	77	B	5	83650 (83)	83628 (64)
Canyon	72	B	16	83676 (83)	83648 (53)
Washington	80	B	3	83610 (88)	83645 (73)
Valley	54	D	5	83611 (61)	83671 (40)
Adams	74	B	5	83654 (89)	83632 (60)
Ada	72	B	38	83669 (79)	83714 (56)
Gem	80	B	2	83617 (94)	83636 (66)
Payette	67	C	3	83661 (76)	83619 (58)
Kootenai	63	C	15	83815 (70)	83809 (40)
Shoshone	60	C	13	83808 (70)	83868 (40)
Bonner	57	C	15	83852 (70)	83865 (40)
Boundary	50	D	5	83805 (68)	83853 (40)
Benewah	54	D	5	83870 (65)	83866 (40)

Most Common Contaminants in Idaho

Contaminant / Rule	Category	ZIPs Affected	Violations	Health Risk
Consumer Confidence Report Rule	Reporting	142	307	Yes
Revised Total Coliform Rule	Microbiological	99	211	No
Stage 1 DBP Rule	Treatment Technique	94	169	Yes
Stage 2 DBP Rule	Treatment Technique	91	162	Yes
Total Coliform	Microbiological	76	106	No
Total Trihalomethanes (TTHM)	Disinfection Byproducts	70	88	Yes
Lead and Copper Rule	Treatment Technique	62	104	No
Combined Radium	Radionuclides	57	201	Yes

Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 324 ZIP codes across Idaho, covering 423 community water systems that serve approximately 1,311,074 people.

222 of 324 ZIP codes (69%) have recorded EPA violations. 278 health-based violations have been documented.

Active Weather Alerts

1 active alert in Idaho including 1 warning. Severe weather can directly affect tap water quality — flooding, power outages, and infrastructure damage may lead to boil-water advisories.

Alert	Severity	Areas
Red Flag Warning	Severe	Owyhee Mountains; Western Twin Falls BLM; Southern Highlands

View all Idaho alerts →

Plumbing Regulations

Idaho follows the Uniform Plumbing Code (2018 edition).

Plumbing code: UPC (2018)
Homeowner DIY: Allowed with permit
Water heater permit: Required
Annual backflow test: Required

Full Idaho regulations →

Areas with Most Violations

ZIP Code	City	Safety Score	Violations	Health-Based	System
83316	Buhl	B	39	2	City of Buhl
83346	Oakley	B	30	4	City of Oakley
83338	Jerome	B	28	1	City of Jerome
83263	Preston	B	25	2	City of Preston
83638	Mccall	C	21	6	City of Mccall
83639	Marsing	B	21	3	City of Marsing
83541	Lenore	B	20	2	New Hope Subd
83647	Mountain Home	C	20	2	City of Mountain Home,
83343	Minidoka	C	18	0	Pelican Point Subdivision
83701	Boise	B	17	3	Veolia Water Idaho

Areas with No Violations

ZIP Code	City	Safety Score	System	Population
83203	Fort Hall	D	POCATELLO CITY OF	58,231
83210	Aberdeen	B	City of Aberdeen	2,088
83212	Arbon	D	ROCKLAND CITY OF	242
83217	Bancroft	C	City of Bancroft	350
83218	Basalt	D	FIRTH CITY OF	511
83220	Bern	D	MONTPELIER CITY OF	2,772
83227	Clayton	D	CHALLIS CITY OF	900
83229	Cobalt	D	SALMON CITY OF	3,158
83230	Conda	D	SODA SPRINGS CITY OF	3,111
83233	Dingle	D	BLOOMINGTON CITY OF	206

Home Safety Score

Average Home Safety Score for Idaho: C (66/100)

Lead & Copper

Average lead level (90th percentile): 0.0032 mg/L (EPA action level: 0.015 mg/L)
3 ZIP codes exceed the EPA lead action level

Radon Risk

High risk (Zone 1): 145 ZIP codes (45%)
Moderate risk (Zone 2): 160 ZIP codes
Low risk (Zone 3): 19 ZIP codes

ZIP Code Reports for Idaho

Largest Communities

ZIP Code	City	Population	Safety Grade	Violations
83642	Meridian	445,526	B	6
83713	Boise	440,131	B	17
83709	Boise	427,631	B	17
83646	Meridian	413,488	B	6
83634	Kuna	398,033	B	2
83687	Nampa	354,832	B	4
83714	Garden City	305,546	C	1
83616	Eagle	303,393	C	5
83702	Boise	293,916	C	17
83703	Boise	292,791	B	17
83704	Boise	292,791	B	17
83706	Boise	292,791	C	17
83701	Boise	280,291	B	17
83705	Boise	280,291	B	17
83707	Boise	280,291	B	17
83708	Boise	280,291	B	17
83711	Boise	280,291	B	17
83712	Boise	280,291	B	17
83715	Boise	280,291	B	17
83716	Boise	280,291	C	17

Lowest Safety Scores

ZIP Code	City	Score	Grade	Violations
83535	Juliaetta	12	F	12
83633	King Hill	33	F	11
83525	Elk City	38	F	11
83203	Fort Hall	40	D	0
83227	Clayton	40	D	0

Highest Safety Scores

ZIP Code	City	Score	Grade	Violations
83543	Nezperce	98	A	4
83555	Winchester	98	A	2
83523	Craigmont	97	A	2
83501	Lewiston	94	A	9
83540	Lapwai	94	A	5

All 324 ZIP Codes in Idaho

83210 (Aberdeen) [B]
83520 (Ahsahka) [C] — 10 violations ⚠
83311 (Albion) [B] — 6 violations ⚠
83312 (Almo) [D]
83211 (American Falls) [C] — 15 violations ⚠
83212 (Arbon) [D]
83213 (Arco) [C] — 3 violations ⚠
83214 (Arimo) [C] — 2 violations ⚠
83420 (Ashton) [C] — 2 violations
83801 (Athol) [C] — 1 violation
83601 (Atlanta) [C] — 2 violations
83215 (Atomic City) [B] — 4 violations ⚠
83802 (Avery) [C] — 1 violation
83217 (Bancroft) [C]
83602 (Banks) [D]
83218 (Basalt) [D]
83803 (Bayview) [C] — 1 violation
83313 (Bellevue) [C] — 6 violations ⚠
83220 (Bern) [D]
83221 (Blackfoot) [B] — 6 violations ⚠
83804 (Blanchard) [C] — 2 violations
83314 (Bliss) [C] — 3 violations
83223 (Bloomington) [B] — 1 violation
83701 (Boise) [B] — 17 violations ⚠
83702 (Boise) [C] — 17 violations ⚠
83703 (Boise) [B] — 17 violations ⚠
83704 (Boise) [B] — 17 violations ⚠
83705 (Boise) [B] — 17 violations ⚠
83706 (Boise) [C] — 17 violations ⚠
83707 (Boise) [B] — 17 violations ⚠
83708 (Boise) [B] — 17 violations ⚠
83709 (Boise) [B] — 17 violations ⚠
83711 (Boise) [B] — 17 violations ⚠
83712 (Boise) [B] — 17 violations ⚠
83713 (Boise) [B] — 17 violations ⚠
83715 (Boise) [B] — 17 violations ⚠
83716 (Boise) [C] — 17 violations ⚠
83717 (Boise) [B] — 17 violations ⚠
83719 (Boise) [B] — 17 violations ⚠
83720 (Boise) [B] — 17 violations ⚠
83721 (Boise) [B] — 17 violations ⚠
83722 (Boise) [B] — 17 violations ⚠
83724 (Boise) [B] — 17 violations ⚠
83725 (Boise) [B] — 17 violations ⚠
83726 (Boise) [B] — 17 violations ⚠
83727 (Boise) [B] — 17 violations ⚠
83728 (Boise) [B] — 17 violations ⚠
83729 (Boise) [B] — 17 violations ⚠
83730 (Boise) [B] — 17 violations ⚠
83731 (Boise) [B] — 17 violations ⚠
83732 (Boise) [B] — 17 violations ⚠
83735 (Boise) [B] — 17 violations ⚠
83756 (Boise) [B] — 17 violations ⚠
83757 (Boise) [B] — 17 violations ⚠
83799 (Boise) [B] — 17 violations ⚠
83805 (Bonners Ferry) [C] — 1 violation
83806 (Bovill) [C] — 1 violation
83604 (Bruneau) [B] — 2 violations ⚠
83316 (Buhl) [B] — 39 violations ⚠
83318 (Burley) [B] — 16 violations ⚠
83808 (Calder) [B]
83605 (Caldwell) [C] — 8 violations
83606 (Caldwell) [C] — 8 violations
83607 (Caldwell) [C] — 8 violations
83610 (Cambridge) [A] — 7 violations
83320 (Carey) [C] — 1 violation
83809 (Careywood) [D]
83462 (Carmen) [D]
83611 (Cascade) [C] — 2 violations
83321 (Castleford) [B] — 1 violation
83810 (Cataldo) [C] — 1 violation
83226 (Challis) [D] — 13 violations
83421 (Chester) [D]
83811 (Clark Fork) [C]
83812 (Clarkia) [C]
83227 (Clayton) [D]
83228 (Clifton) [B] — 6 violations ⚠
83229 (Cobalt) [D]
83813 (Cocolalla) [D]
83814 (Coeur D Alene) [C]
83815 (Coeur D Alene) [B]
83816 (Coeur D Alene) [B]
83865 (Colburn) [D]
83230 (Conda) [D]
83821 (Coolin) [C] — 2 violations
83322 (Corral) [D]
83522 (Cottonwood) [C] — 7 violations
83612 (Council) [A]
83523 (Craigmont) [A] — 2 violations
83524 (Culdesac) [A] — 5 violations
83232 (Dayton) [B] — 3 violations ⚠
83823 (Deary) [C] — 1 violation
83323 (Declo) [B] — 1 violation
83824 (Desmet) [D]
83324 (Dietrich) [B] — 4 violations ⚠
83233 (Dingle) [D]
83615 (Donnelly) [C] — 7 violations
83825 (Dover) [D] — 2 violations ⚠
83234 (Downey) [B] — 1 violation
83422 (Driggs) [B] — 1 violation
83423 (Dubois) [C] — 2 violations ⚠
83616 (Eagle) [C] — 5 violations
83826 (Eastport) [D]
83325 (Eden) [B] — 6 violations
83525 (Elk City) [F] — 11 violations ⚠
83827 (Elk River) [C]
83235 (Ellis) [D]
83617 (Emmett) [A] — 3 violations ⚠
83327 (Fairfield) [C] — 4 violations ⚠
83424 (Felt) [D]
83531 (Fenn) [C] — 2 violations
83526 (Ferdinand) [C] — 4 violations ⚠
83830 (Fernwood) [C] — 1 violation
83328 (Filer) [B] — 12 violations ⚠
83236 (Firth) [B]
83287 (Fish Haven) [B] — 1 violation
83203 (Fort Hall) [D]
83237 (Franklin) [B] — 15 violations ⚠
83619 (Fruitland) [C] — 9 violations ⚠
83714 (Garden City) [C] — 1 violation
83622 (Garden Valley) [C] — 5 violations ⚠
83832 (Genesee) [C] — 1 violation
83238 (Geneva) [D]
83239 (Georgetown) [B]
83463 (Gibbonsville) [D]
83623 (Glenns Ferry) [C] — 3 violations
83330 (Gooding) [C] — 2 violations
83241 (Grace) [B] — 4 violations ⚠
83624 (Grand View) [B] — 13 violations ⚠
83530 (Grangeville) [C] — 5 violations
83533 (Greencreek) [D]
83626 (Greenleaf) [B] — 1 violation
83332 (Hagerman) [C] — 4 violations
83333 (Hailey) [C] — 3 violations
83425 (Hamer) [D]
83627 (Hammett) [D]
83334 (Hansen) [B] — 5 violations ⚠
83833 (Harrison) [C] — 2 violations ⚠
83834 (Harvard) [D] — 13 violations
83835 (Hayden) [C] — 1 violation
83335 (Hazelton) [B]
83336 (Heyburn) [B] — 9 violations ⚠
83337 (Hill City) [D]
83243 (Holbrook) [D]
83628 (Homedale) [C] — 7 violations
83836 (Hope) [C] — 4 violations
83629 (Horseshoe Bend) [D] — 8 violations
83244 (Howe) [C] — 1 violation
83630 (Huston) [D]
83631 (Idaho City) [C] — 10 violations ⚠
83401 (Idaho Falls) [B] — 11 violations ⚠
83402 (Idaho Falls) [B] — 11 violations ⚠
83403 (Idaho Falls) [B] — 11 violations ⚠
83404 (Idaho Falls) [B] — 11 violations ⚠
83405 (Idaho Falls) [B] — 11 violations ⚠
83406 (Idaho Falls) [B] — 11 violations ⚠
83415 (Idaho Falls) [B] — 11 violations ⚠
83632 (Indian Valley) [C] — 4 violations
83245 (Inkom) [B] — 3 violations
83427 (Iona) [B] — 7 violations ⚠
83428 (Irwin) [D]
83429 (Island Park) [D]
83338 (Jerome) [B] — 28 violations ⚠
83535 (Juliaetta) [F] — 12 violations ⚠
83536 (Kamiah) [C] — 7 violations
83837 (Kellogg) [C] — 1 violation
83537 (Kendrick) [B]
83340 (Ketchum) [D] — 3 violations
83341 (Kimberly) [B] — 3 violations
83633 (King Hill) [F] — 11 violations ⚠
83839 (Kingston) [C] — 1 violation
83539 (Kooskia) [C] — 1 violation
83840 (Kootenai) [D]
83634 (Kuna) [B] — 2 violations
83841 (Laclede) [D]
83635 (Lake Fork) [C]
83540 (Lapwai) [A] — 5 violations
83246 (Lava Hot Springs) [B] — 1 violation
83464 (Leadore) [D]
83465 (Lemhi) [D]
83541 (Lenore) [B] — 20 violations ⚠
83636 (Letha) [C]
83501 (Lewiston) [A] — 9 violations ⚠
83431 (Lewisville) [C]
83637 (Lowman) [D]
83542 (Lucile) [D]
83251 (Mackay) [B]
83433 (Macks Inn) [D]
83252 (Malad City) [C]
83342 (Malta) [D]
83639 (Marsing) [B] — 21 violations ⚠
83253 (May) [D]
83638 (Mccall) [C] — 21 violations ⚠
83250 (Mccammon) [B] — 2 violations
83842 (Medimont) [C]
83641 (Melba) [B] — 4 violations
83434 (Menan) [C]
83642 (Meridian) [B] — 6 violations ⚠
83646 (Meridian) [B] — 6 violations ⚠
83680 (Meridian) [B] — 6 violations ⚠
83643 (Mesa) [C]
83644 (Middleton) [B] — 6 violations ⚠
83645 (Midvale) [B]
83343 (Minidoka) [C] — 18 violations
83435 (Monteview) [B] — 1 violation
83254 (Montpelier) [B] — 2 violations
83255 (Moore) [C] — 2 violations
83256 (Moreland) [B] — 1 violation
83843 (Moscow) [C] — 8 violations ⚠
83844 (Moscow) [C] — 8 violations ⚠
83647 (Mountain Home) [C] — 20 violations ⚠
83648 (Mountain Home A F B) [D]
83845 (Moyie Springs) [C] — 5 violations ⚠
83846 (Mullan) [D]
83650 (Murphy) [B]
83874 (Murray) [C] — 7 violations
83344 (Murtaugh) [C] — 3 violations ⚠
83651 (Nampa) [B] — 4 violations
83652 (Nampa) [B] — 4 violations
83653 (Nampa) [B] — 4 violations
83686 (Nampa) [B] — 4 violations
83687 (Nampa) [B] — 4 violations
83847 (Naples) [D]
83654 (New Meadows) [A] — 3 violations
83655 (New Plymouth) [C] — 11 violations ⚠
83436 (Newdale) [C] — 1 violation
83543 (Nezperce) [A] — 4 violations ⚠
83848 (Nordman) [D]
83466 (North Fork) [D]
83656 (Notus) [B] — 4 violations
83346 (Oakley) [B] — 30 violations ⚠
83657 (Ola) [D]
83822 (Oldtown) [D]
83544 (Orofino) [D] — 5 violations ⚠
83849 (Osburn) [D]
83261 (Paris) [B] — 2 violations
83438 (Parker) [C] — 5 violations ⚠
83660 (Parma) [C] — 8 violations
83347 (Paul) [B] — 2 violations
83661 (Payette) [B] — 1 violation
83545 (Peck) [A] — 2 violations
83348 (Picabo) [C] — 3 violations
83546 (Pierce) [D] — 7 violations ⚠
83850 (Pinehurst) [B]
83262 (Pingree) [C]
83666 (Placerville) [D]
83851 (Plummer) [C] — 7 violations
83201 (Pocatello) [B] — 1 violation
83202 (Pocatello) [B] — 1 violation
83204 (Pocatello) [B] — 1 violation
83205 (Pocatello) [B] — 1 violation
83206 (Pocatello) [B] — 1 violation
83209 (Pocatello) [B] — 1 violation
83547 (Pollock) [D]
83852 (Ponderay) [B]
83853 (Porthill) [D]
83854 (Post Falls) [C] — 1 violation ⚠
83877 (Post Falls) [C] — 1 violation ⚠
83855 (Potlatch) [C] — 4 violations ⚠
83263 (Preston) [B] — 25 violations ⚠
83856 (Priest River) [C] — 3 violations
83857 (Princeton) [C]
83858 (Rathdrum) [C] — 2 violations
83548 (Reubens) [A] — 9 violations ⚠
83440 (Rexburg) [B] — 13 violations ⚠
83441 (Rexburg) [B] — 13 violations ⚠
83460 (Rexburg) [B] — 13 violations ⚠
83349 (Richfield) [B] — 2 violations
83442 (Rigby) [B] — 10 violations ⚠
83549 (Riggins) [C] — 3 violations
83443 (Ririe) [B] — 1 violation
83444 (Roberts) [B] — 3 violations
83271 (Rockland) [B] — 6 violations ⚠
83302 (Rogerson) [B]
83350 (Rupert) [B] — 5 violations
83860 (Sagle) [C] — 1 violation
83445 (Saint Anthony) [D]
83272 (Saint Charles) [D]
83861 (Saint Maries) [D]
83467 (Salmon) [D] — 10 violations ⚠
83864 (Sandpoint) [C] — 5 violations ⚠
83866 (Santa) [D]
83274 (Shelley) [B] — 10 violations
83352 (Shoshone) [B]
83469 (Shoup) [D]
83867 (Silverton) [D]
83868 (Smelterville) [D]
83276 (Soda Springs) [B] — 5 violations
83446 (Spencer) [D]
83869 (Spirit Lake) [C] — 2 violations
83277 (Springfield) [D] — 3 violations
83278 (Stanley) [D]
83669 (Star) [B] — 1 violation
83552 (Stites) [C] — 3 violations
83448 (Sugar City) [B] — 1 violation
83353 (Sun Valley) [C] — 11 violations ⚠
83354 (Sun Valley) [C] — 11 violations ⚠
83449 (Swan Valley) [B] — 7 violations
83281 (Swanlake) [C]
83670 (Sweet) [D]
83468 (Tendoy) [D]
83870 (Tensed) [C] — 9 violations ⚠
83450 (Terreton) [C]
83451 (Teton) [C]
83452 (Tetonia) [B] — 1 violation
83283 (Thatcher) [D]
83871 (Troy) [C] — 8 violations ⚠
83301 (Twin Falls) [C] — 10 violations ⚠
83303 (Twin Falls) [B] — 10 violations ⚠
83454 (Ucon) [B] — 5 violations ⚠
83455 (Victor) [B] — 7 violations ⚠
83872 (Viola) [C] — 1 violation
83873 (Wallace) [C]
83671 (Warren) [D]
83285 (Wayan) [D]
83553 (Weippe) [C]
83672 (Weiser) [B] — 1 violation
83355 (Wendell) [B]
83286 (Weston) [B]
83554 (White Bird) [C] — 4 violations
83676 (Wilder) [B]
83555 (Winchester) [A] — 2 violations
83876 (Worley) [C] — 16 violations ⚠
83677 (Yellow Pine) [D] — 8 violations

Data Sources

Water quality: EPA Safe Drinking Water Information System (SDWIS)
Weather alerts: National Weather Service (NWS)
Regulations: State plumbing boards, ICC, IAPMO

Updated daily.

Frequently Asked Questions

Is the water safe to drink in Idaho?

Idaho has 423 community water systems serving 1,311,074 people across 324 ZIP codes. There are 1,665 recorded violations, including 278 health-based. 222 of 324 ZIP codes have at least one violation.

What plumbing code does Idaho follow?

Idaho follows the UPC plumbing code. DIY plumbing work is allowed for homeowners.

Is lead a concern in Idaho's drinking water?

3 ZIP codes in Idaho have lead levels exceeding the EPA action level of 0.015 mg/L.

What is the radon risk in Idaho?

45% of ZIP codes in Idaho fall in EPA Radon Zone 1 (highest risk).