Water Quality in ASHLAND, MT (59003)

EPA violation data for public water systems serving ZIP code 59003.

140

Total Violations

Health-Based

Monitoring / Reporting

133

Resolved

What does this mean?

133 of 140 violations have been resolved. 69 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 71 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.

Water systems: 6 Population served: 1,598

Violations Detail (140 total)

Contaminant	Category	MCL Limit	Measured	Date	Status	Health Effects
TTHM	Health-Based	N/A	0.083	Sep 30, 2025	Active	N/A
TTHM	Health-Based	N/A	0.083	Sep 30, 2025	Active	N/A
TTHM	Health-Based	N/A	0.083	Sep 30, 2025	Active	N/A
TTHM	Health-Based	N/A	0.083	Sep 30, 2025	Active	N/A
TTHM	Health-Based	N/A	0.083	Sep 30, 2025	Active	N/A
TTHM	Health-Based	N/A	0.083	Sep 30, 2025	Active	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2025	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Dec 31, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2024	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2024	Active	N/A
TTHM	Health-Based	N/A	83	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	83	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	83	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	83	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2024	Resolved	N/A
TTHM	Health-Based	N/A	0.092	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.092	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.092	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.092	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
Nitrate-Nitrite	Monitoring	N/A	N/A	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.092	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.092	Dec 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.086	Sep 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.086	Sep 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.086	Sep 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.086	Sep 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Sep 30, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Aug 9, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Aug 9, 2023	Resolved	N/A
Revised Total Coliform Rule	Health-Based	N/A	N/A	Aug 9, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Jun 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Jun 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Jun 30, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Jun 30, 2023	Resolved	N/A
Fluoride	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Jun 30, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	May 31, 2023	Resolved	N/A
E. COLI	Monitoring	0	N/A	May 24, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 24, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 24, 2023	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
TTHM	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
TTHM	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2023	Resolved	N/A
TTHM	Health-Based	N/A	0.082	Mar 31, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Total Haloacetic Acids (HAA5)	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	N/A
Fluoride	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Mar 31, 2023	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.087	Jun 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.087	Jun 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.087	Jun 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.087	Jun 30, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.087	Jun 30, 2022	Resolved	N/A
Fluoride	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Chlorine	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
Chlorine	Monitoring	N/A	N/A	Jun 30, 2022	Resolved	Eye and nose irritation; stomach discomfort
E. COLI	Monitoring	0	N/A	May 30, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 30, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 30, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
E. COLI	Monitoring	0	N/A	May 30, 2022	Resolved	Severe gastrointestinal illness; may be fatal in vulnerable populations
TTHM	Health-Based	N/A	0.095	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.095	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.095	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.095	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.095	Mar 31, 2022	Resolved	N/A
TTHM	Health-Based	N/A	0.09	Dec 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	0.09	Dec 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	0.09	Dec 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	0.09	Dec 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	0.09	Dec 31, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Dec 29, 2021	Resolved	N/A
TTHM	Health-Based	N/A	90	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	90	Sep 30, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	90	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	90	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	90	Sep 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	90	Sep 30, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 30, 2021	Resolved	N/A
Lead and Copper Rule	Monitoring	N/A	N/A	Sep 28, 2021	Resolved	N/A
TTHM	Health-Based	N/A	88	Jun 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	88	Jun 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	88	Jun 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	88	Jun 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	88	Jun 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	88	Jun 30, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Consumer Confidence Rule	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	N/A
Fluoride	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Fluoride	Monitoring	N/A	N/A	Jun 30, 2021	Resolved	Bone disease (pain and tenderness of the bones); children may get mottled teeth
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
Revised Total Coliform Rule	Monitoring	N/A	N/A	Apr 30, 2021	Resolved	N/A
TTHM	Health-Based	N/A	84.3	Mar 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	84.3	Mar 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	84.3	Mar 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	84.3	Mar 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	84.3	Mar 31, 2021	Resolved	N/A
TTHM	Health-Based	N/A	84.3	Mar 31, 2021	Resolved	N/A

Lead & Copper Levels

Violation Timeline

2025(10)

TTHM

Sep 30Active

TTHM

Sep 30Active

TTHM

Sep 30Active

TTHM

Sep 30Active

TTHM

Sep 30Active

TTHM

Sep 30Active

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

Revised Total Coliform Rule

May 31Resolved

2024(25)

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

Total Haloacetic Acids (HAA5)

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

TTHM

Dec 31Resolved

Lead and Copper Rule

Dec 29Resolved

Lead and Copper Rule

Dec 29Active

TTHM

Jun 30Resolved

TTHM

Jun 30Resolved

TTHM

Jun 30Resolved

TTHM

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

Consumer Confidence Rule

Jun 30Resolved

TTHM

Mar 31Resolved

TTHM

Mar 31Resolved

TTHM

Mar 31Resolved

TTHM

Mar 31Resolved

TTHM

Mar 31Resolved

How Does This Compare?

ASHLAND (59003) has 140 recorded violations, including 69 health-based. 7 remain unresolved. Consider testing your tap water independently for added peace of mind.

Recommended Water Filters

Based on the contaminants detected in your area, these filter types may help improve your water quality.

Reverse Osmosis System

Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.

Targets:Lead, Copper, Arsenic, Mercury, Cadmium

Look for:NSF/ANSI 58 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

Activated Carbon Filter

Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.

Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor

Look for:NSF/ANSI 42 & 53 certified

NSF Certified Products → EPA Safe Drinking Water Guide →

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.

Water Quality in ASHLAND, MT (59003)

What does this mean?

Violations Detail (140 total)

Lead & Copper Levels

Violation Timeline

2025(10)

2024(25)

2023(46)

2022(22)

2021(37)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Activated Carbon Filter

UV Water Purifier

Nearby ZIP Codes

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