Water Quality in Hamilton, MT (59840)

EPA violation data for public water systems serving ZIP code 59840.

Active Health Violations

6 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.

More violations than 98% of US ZIP codes.

Based on EPA compliance data. Not a substitute for an official water quality report from your utility.

15,679

Population

Water Systems

171

Violations (5yr)

Health-Based

Location

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Water Systems Serving This Area (86)

Hamilton City Of

Groundwater 5,585 people served

0 violations

Valley Water Company

Groundwater 4,000 people served

0 violations

Lone Pine Store

Groundwater 600 people served

0 violations

Gsk Biologicals

Purchased groundwater 560 people served

0 violations

Lead tested: 0 ppb (limit: 15 ppb) ✓

Canyons Athletic Club The

All resolved

Groundwater 500 people served

1 violation (5yr) · All resolved

Roaring Lion Restaurant

Groundwater 400 people served

0 violations

Daly School

Groundwater 300 people served

0 violations

Subway Sandwich Shop Hamilton

All resolved

Groundwater 210 people served

3 violations (5yr) · All resolved

Pharaohplex

Groundwater 200 people served

0 violations

Kootenai Creek Village

Groundwater 175 people served

0 violations

Lead tested: 1 ppb (limit: 15 ppb) ✓

River Bend Athletic Club

Groundwater 160 people served

0 violations

Hamilton Golf Club Snack Shop

1 health-based

Groundwater 150 people served

4 violations (5yr) · 1 health-based · All resolved

Stock Farm The

All resolved

Groundwater 150 people served

1 violation (5yr) · All resolved

Lead tested: 2 ppb (limit: 15 ppb) ✓

Rib Hut The

Groundwater 140 people served

0 violations

Daly Estates Subdivision

Groundwater 123 people served

0 violations

Lead tested: 0 ppb (limit: 15 ppb) ✓

Wild Flower Hoa, The

All resolved

Groundwater 120 people served

1 violation (5yr) · All resolved

Valley View Estates Health Care Center

Groundwater 120 people served

0 violations

Corixa Corporation

Groundwater 105 people served

0 violations

Grace Lutheran Childcare And Preschool

Groundwater 100 people served

0 violations

Sleeping Child Church

All resolved

Groundwater 100 people served

1 violation (5yr) · All resolved

Canyon View Church

All resolved

Groundwater 100 people served

2 violations (5yr) · All resolved

Anglers Roost

All resolved

Groundwater 94 people served

1 violation (5yr) · All resolved

7th Day Adventist Christian School

All resolved

Groundwater 88 people served

3 violations (5yr) · All resolved

Antigone Acres Hoa

Groundwater 85 people served

0 violations

Lead tested: 0 ppb (limit: 15 ppb) ✓

Lake Como Recreation Area

All resolved

Groundwater 84 people served

1 violation (5yr) · All resolved

Big Sky Christian Center

Groundwater 80 people served

0 violations

Curious Minds Montessori Preschool

Groundwater 80 people served

116 violations (5yr)

Lead tested: 1 ppb (limit: 15 ppb) ✓

Resolved

LASSO Monitoring

Jul 2024 Resolved

2,4,5-TP Monitoring

Jul 2024 Resolved

Toxaphene Monitoring

Jul 2024 Resolved

Atrazine Monitoring

Jul 2024 Resolved

BHC-GAMMA Monitoring

Jul 2024 Resolved

Dalapon Monitoring

Jul 2024 Resolved

Simazine Monitoring

Jul 2024 Resolved

Dinoseb Monitoring

Jul 2024 Resolved

Pentachlorophenol Monitoring

Jul 2024 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Jul 2024 Resolved

Carbofuran Monitoring

Jul 2024 Resolved

Endrin Monitoring

Jul 2024 Resolved

Heptachlor Monitoring

Jul 2024 Resolved

Methoxychlor Monitoring

Jul 2024 Resolved

Picloram Monitoring

Jul 2024 Resolved

Chlordane Monitoring

Jul 2024 Resolved

Di(2-ethylhexyl) adipate Monitoring

Jul 2024 Resolved

HEXACHLOROBENZENE Monitoring

Jul 2024 Resolved

Hexachlorocyclopentadiene Monitoring

Jul 2024 Resolved

Benzo(a)pyrene Monitoring

Jul 2024 Resolved

Heptachlor epoxide Monitoring

Jul 2024 Resolved

2,4-D Monitoring

Jul 2024 Resolved

OXAMYL Monitoring

Jul 2024 Resolved

Di(2-ethylhexyl) adipate Monitoring

Apr 2024 Resolved

Heptachlor Monitoring

Apr 2024 Resolved

2,4-D Monitoring

Apr 2024 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Apr 2024 Resolved

HEXACHLOROBENZENE Monitoring

Apr 2024 Resolved

Carbofuran Monitoring

Apr 2024 Resolved

Dinoseb Monitoring

Apr 2024 Resolved

Pentachlorophenol Monitoring

Apr 2024 Resolved

Picloram Monitoring

Apr 2024 Resolved

Toxaphene Monitoring

Apr 2024 Resolved

Simazine Monitoring

Apr 2024 Resolved

Methoxychlor Monitoring

Apr 2024 Resolved

BHC-GAMMA Monitoring

Apr 2024 Resolved

Hexachlorocyclopentadiene Monitoring

Apr 2024 Resolved

LASSO Monitoring

Apr 2024 Resolved

Dalapon Monitoring

Apr 2024 Resolved

Atrazine Monitoring

Apr 2024 Resolved

Benzo(a)pyrene Monitoring

Apr 2024 Resolved

Endrin Monitoring

Apr 2024 Resolved

Chlordane Monitoring

Apr 2024 Resolved

OXAMYL Monitoring

Apr 2024 Resolved

2,4,5-TP Monitoring

Apr 2024 Resolved

Heptachlor epoxide Monitoring

Apr 2024 Resolved

Endrin Monitoring

Jan 2024 Resolved

Atrazine Monitoring

Jan 2024 Resolved

Chlordane Monitoring

Jan 2024 Resolved

Dalapon Monitoring

Jan 2024 Resolved

OXAMYL Monitoring

Jan 2024 Resolved

Simazine Monitoring

Jan 2024 Resolved

Di(2-ethylhexyl) adipate Monitoring

Jan 2024 Resolved

Carbofuran Monitoring

Jan 2024 Resolved

2,4,5-TP Monitoring

Jan 2024 Resolved

Hexachlorocyclopentadiene Monitoring

Jan 2024 Resolved

Benzo(a)pyrene Monitoring

Jan 2024 Resolved

LASSO Monitoring

Jan 2024 Resolved

BHC-GAMMA Monitoring

Jan 2024 Resolved

Toxaphene Monitoring

Jan 2024 Resolved

Picloram Monitoring

Jan 2024 Resolved

Dinoseb Monitoring

Jan 2024 Resolved

Methoxychlor Monitoring

Jan 2024 Resolved

Heptachlor Monitoring

Jan 2024 Resolved

2,4-D Monitoring

Jan 2024 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Jan 2024 Resolved

Heptachlor epoxide Monitoring

Jan 2024 Resolved

HEXACHLOROBENZENE Monitoring

Jan 2024 Resolved

Pentachlorophenol Monitoring

Jan 2024 Resolved

Heptachlor Monitoring

Oct 2023 Resolved

OXAMYL Monitoring

Oct 2023 Resolved

Atrazine Monitoring

Oct 2023 Resolved

Di(2-ethylhexyl) adipate Monitoring

Oct 2023 Resolved

2,4,5-TP Monitoring

Oct 2023 Resolved

Pentachlorophenol Monitoring

Oct 2023 Resolved

LASSO Monitoring

Oct 2023 Resolved

Methoxychlor Monitoring

Oct 2023 Resolved

HEXACHLOROBENZENE Monitoring

Oct 2023 Resolved

Simazine Monitoring

Oct 2023 Resolved

Toxaphene Monitoring

Oct 2023 Resolved

BHC-GAMMA Monitoring

Oct 2023 Resolved

Dinoseb Monitoring

Oct 2023 Resolved

Heptachlor epoxide Monitoring

Oct 2023 Resolved

Picloram Monitoring

Oct 2023 Resolved

Benzo(a)pyrene Monitoring

Oct 2023 Resolved

Chlordane Monitoring

Oct 2023 Resolved

Hexachlorocyclopentadiene Monitoring

Oct 2023 Resolved

2,4-D Monitoring

Oct 2023 Resolved

Carbofuran Monitoring

Oct 2023 Resolved

Dalapon Monitoring

Oct 2023 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Oct 2023 Resolved

Endrin Monitoring

Oct 2023 Resolved

Xylenes, Total Monitoring

Jan 2023 Resolved

DICHLOROMETHANE Monitoring

Jan 2023 Resolved

Toluene Monitoring

Jan 2023 Resolved

cis-1,2-Dichloroethylene Monitoring

Jan 2023 Resolved

Vinyl chloride Monitoring

Jan 2023 Resolved

1,2-Dichloropropane Monitoring

Jan 2023 Resolved

Benzene Monitoring

Jan 2023 Resolved

1,2,4-Trichlorobenzene Monitoring

Jan 2023 Resolved

p-Dichlorobenzene Monitoring

Jan 2023 Resolved

Ethylbenzene Monitoring

Jan 2023 Resolved

1,1-Dichloroethylene Monitoring

Jan 2023 Resolved

o-Dichlorobenzene Monitoring

Jan 2023 Resolved

1,1,1-Trichloroethane Monitoring

Jan 2023 Resolved

1,1,2-Trichloroethane Monitoring

Jan 2023 Resolved

Carbon tetrachloride Monitoring

Jan 2023 Resolved

trans-1,2-Dichloroethylene Monitoring

Jan 2023 Resolved

Trichloroethylene Monitoring

Jan 2023 Resolved

Tetrachloroethylene Monitoring

Jan 2023 Resolved

CHLOROBENZENE Monitoring

Jan 2023 Resolved

1,2-Dichloroethane Monitoring

Jan 2023 Resolved

Styrene Monitoring

Jan 2023 Resolved

Lead and Copper Rule Monitoring

Sep 2022 Resolved

Lead and Copper Rule Monitoring

Jul 2021 Resolved

Bitterroot Clinic Hamilton

Groundwater 75 people served

0 violations

Ravalli Co Creamery

Groundwater 75 people served

0 violations

Rocky Mountain Building Company

Groundwater 75 people served

0 violations

Big Sky Trailer Ct Hamilton

Groundwater 70 people served

0 violations

Lead tested: 5 ppb (limit: 15 ppb) ✓

Sleeping Child Hot Springs

Groundwater 70 people served

0 violations

Grubstake Restaurant

Groundwater 62 people served

0 violations

Westana Mobile Court

Groundwater 61 people served

0 violations

Ponderosa Mobile Home Park

Groundwater 60 people served

0 violations

Lead tested: 10 ppb (limit: 15 ppb) ✓

East Fork Guard Station

Groundwater 55 people served

0 violations

Memories Cafe

All resolved

Groundwater 54 people served

1 violation (5yr) · All resolved

Corvallis Family Medicine

2 health-based

Groundwater 54 people served

6 violations (5yr) · 2 health-based · All resolved

West Fork Ranger Station

Groundwater 54 people served

1 violation (5yr)

Skalkaho Steakhouse

All resolved

Groundwater 52 people served

4 violations (5yr) · All resolved

Flying Pig Saloon

All resolved

Groundwater 52 people served

18 violations (5yr) · All resolved

Stumble Back Inn

1 health-based

Groundwater 52 people served

2 violations (5yr) · 1 health-based · All resolved

Grubstake Restaurant

Groundwater 50 people served

0 violations

Marcus Daly Memorial Hospital

Groundwater 50 people served

0 violations

City Center Motel

Groundwater 50 people served

0 violations

Bradley Os Homestead

Groundwater 50 people served

0 violations

A & W Drive Inn

Groundwater 50 people served

0 violations

Wagon Wheel Restaurant

Groundwater 50 people served

0 violations

Taste Freeze

Groundwater 50 people served

0 violations

Wards Cove Water Users

Groundwater 45 people served

0 violations

Lead tested: 2 ppb (limit: 15 ppb) ✓

Bitterroot Pines Tr Ct Florence

Groundwater 45 people served

0 violations

Lead tested: 2 ppb (limit: 15 ppb) ✓

Rombo Campground

Groundwater 40 people served

0 violations

Sula Ranger Station

Groundwater 38 people served

0 violations

Lead tested: 4 ppb (limit: 15 ppb) ✓

Broad Axe Lodge

Groundwater 37 people served

0 violations

Slate Creek Campground

Groundwater 37 people served

0 violations

Sfe

2 health-based

Groundwater 35 people served

5 violations (5yr) · 2 health-based · All resolved

Montana Artistic Impressions

Groundwater 34 people served

0 violations

The Lucky Fox, Llc

Groundwater 30 people served

0 violations

The Coffee Cup Hamilton Unapproved

Groundwater 30 people served

0 violations

Hamilton First Baptist Church

Groundwater 30 people served

0 violations

Fox Lumber Unapproved

Groundwater 30 people served

0 violations

Northside Center Unapproved

Groundwater 30 people served

0 violations

Sonshine Daycare

Groundwater 30 people served

0 violations

Warm Springs Campground

Groundwater 26 people served

0 violations

Lick Creek Cg

Groundwater 25 people served

0 violations

Martin Creek Campground

Groundwater 25 people served

0 violations

Crazy Cr Cg Lower Well No 2

Groundwater 25 people served

0 violations

Mickeys Fast Lube

Groundwater 25 people served

0 violations

Lake Como Boat Well No 3

Groundwater 25 people served

0 violations

Schumaker Campground

Groundwater 25 people served

0 violations

Lost Horse Lodge

Groundwater 25 people served

0 violations

Alta Campground

Groundwater 25 people served

0 violations

Jennings Camp

Groundwater 25 people served

0 violations

Black Bear Campground

Groundwater 25 people served

0 violations

Lake Como Picnic Well No 2

Groundwater 25 people served

0 violations

Energy Plant

Groundwater 25 people served

0 violations

Bitterroot Motel Hamilton

Groundwater 18 people served

0 violations

Vicks Motel

Groundwater 18 people served

0 violations

Riverside Inn

Groundwater 15 people served

0 violations

Brass Rail

Groundwater 10 people served

0 violations

Mountain View Tr Ct Hamilton

Groundwater 10 people served

0 violations

Crazy Cr Cg Upper Well No 1

Groundwater 10 people served

0 violations

Usfs Paradise Guard Station

Surface water 8 people served

0 violations

Usfs Magruder Work Center

Groundwater 6 people served

0 violations

Sawbuck 2 Llc

Groundwater 0

0 violations

Hideout

Groundwater 0

0 violations

Contaminants Found

Groundwater RuleHealth-Based

30 violations

All resolved

Revised Total Coliform RuleHealth-Based

Missed testing deadlines — not a detection of bacteria.

16 violations

All resolved

Nitrate-NitriteMonitoring

5 violations

All resolved

Lead and Copper RuleMonitoring

Lead and copper testing requirement. Lead exposure can cause developmental harm in children.

4 violations

Has active

LASSOMonitoring

4 violations

All resolved

2,4,5-TPMonitoring

4 violations

All resolved

ToxapheneMonitoring

4 violations

All resolved

AtrazineMonitoring

4 violations

All resolved

BHC-GAMMAMonitoring

4 violations

All resolved

DalaponMonitoring

4 violations

All resolved

SimazineMonitoring

4 violations

All resolved

DinosebMonitoring

4 violations

All resolved

PentachlorophenolMonitoring

4 violations

All resolved

Di(2-ethylhexyl) phthalateMonitoring

4 violations

All resolved

CarbofuranMonitoring

4 violations

All resolved

EndrinMonitoring

4 violations

All resolved

HeptachlorMonitoring

4 violations

All resolved

MethoxychlorMonitoring

4 violations

All resolved

PicloramMonitoring

4 violations

All resolved

ChlordaneMonitoring

4 violations

All resolved

Di(2-ethylhexyl) adipateMonitoring

4 violations

All resolved

HEXACHLOROBENZENEMonitoring

4 violations

All resolved

HexachlorocyclopentadieneMonitoring

4 violations

All resolved

Benzo(a)pyreneMonitoring

4 violations

All resolved

Heptachlor epoxideMonitoring

4 violations

All resolved

2,4-DMonitoring

4 violations

All resolved

OXAMYLMonitoring

4 violations

All resolved

E. COLIMonitoring

2 violations

Has active

Consumer Confidence RuleMonitoring

Annual water quality report delivery requirement.

1 violation

All resolved

Xylenes, TotalMonitoring

1 violation

All resolved

DICHLOROMETHANEMonitoring

1 violation

All resolved

TolueneMonitoring

1 violation

All resolved

cis-1,2-DichloroethyleneMonitoring

1 violation

All resolved

Vinyl chlorideMonitoring

1 violation

All resolved

1,2-DichloropropaneMonitoring

1 violation

All resolved

BenzeneMonitoring

1 violation

All resolved

1,2,4-TrichlorobenzeneMonitoring

1 violation

All resolved

p-DichlorobenzeneMonitoring

1 violation

All resolved

EthylbenzeneMonitoring

1 violation

All resolved

1,1-DichloroethyleneMonitoring

1 violation

All resolved

o-DichlorobenzeneMonitoring

1 violation

All resolved

1,1,1-TrichloroethaneMonitoring

1 violation

All resolved

1,1,2-TrichloroethaneMonitoring

1 violation

All resolved

Carbon tetrachlorideMonitoring

1 violation

All resolved

trans-1,2-DichloroethyleneMonitoring

1 violation

All resolved

TrichloroethyleneMonitoring

1 violation

All resolved

TetrachloroethyleneMonitoring

1 violation

All resolved

CHLOROBENZENEMonitoring

1 violation

All resolved

1,2-DichloroethaneMonitoring

1 violation

All resolved

StyreneMonitoring

1 violation

All resolved

Lead & Copper Levels

Lead (Pb)

Within limit

2 ppb measured Action level: 15 ppb

Sampled: Jan 2023

How Does This Compare?

Hamilton (59840) has more violations than 98% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 171.

Fewer violations 98th percentile More violations

Recommended Water Filters

Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.