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Golden Estates Trailer Court

What EPA’s and Montana’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
225 people
Connections
68
Water source
Groundwater
Based in
Helena, MT
County
Lewis and Clark
Owner
Private
The ZIP code it serves

59601

The short answer

1 result is above EPA’s legal limit, and 1 more is above the health goal. The worst: Arsenic, above the legal limit. 3 health-based violations since 2016.

What handles it

What was found

Arsenic, uranium, nitrate, fluoride, total trihalomethanes (TTHM) and chromium (total): Montana’s own results, samples taken from March 10, 2020 to Jan. 6, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Arsenic

Comes from the source

Above the legal limit

11.5ppb

Highest yearly average, 2020 to 2023

2023 average: 9.0 ppb

Averaged by year, the highest was 11.5 ppb, in 2022, above EPA’s legal limit of 10 ppb. Its highest single sample was 14 ppb. In 2023, the latest year on file, its two samples averaged 9.0 ppb. EPA recorded a violation for arsenic at this utility in 2022. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 13.6 ppb, in 2019.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Above the health goal1

Uranium

Comes from the source

Above the health goal

11ppb

Highest yearly average, 2020

Averaged by year, the highest was 11 ppb, in 2020: below EPA’s legal limit of 30 ppb, but above its health goal of zero. Its highest single sample was 14 ppb. That is the only year on file.

What handles it

Below EPA’s limits3

Nitrate

Comes from the source

Below EPA’s limits

4.7ppm

Highest sample; found in 11 of 11

2026, one sample: 4.6 ppm

The highest sample, in 2024, was 4.7 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 4.6 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 4.1 ppm, in 2016.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.25ppm

Highest yearly average, 2020

Averaged by year, the highest was 0.25 ppm, in 2020, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.3 ppm. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.26 ppm, in 2013.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

1.7ppb

Highest yearly average, 2020 to 2024

Averaged by year, the highest was 1.7 ppb, in 2024, below EPA’s legal limit of 80 ppb. Its highest single sample was 2.2 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.63 ppb, in 2019.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Lead

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

  • NSF/ANSI 53

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Uranium

    For: Arsenic, Uranium

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best reverse osmosis systems, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2022 to Sept. 30, 20220.012 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2022 to June 30, 20220.012 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2022 to March 31, 20220.011 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 5 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, uranium, nitrate, fluoride, total trihalomethanes (TTHM) and chromium (total) results here are Montana’s own from 2020 on, with EPA’s national file for 2012 to 2019. Golden Estates Trailer Court’s own annual report, which it must send you every year, has the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Montana’s results run from March 10, 2020 to Jan. 6, 2026.

Testing your own tap

Golden Estates Trailer Court’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Montana certifies.

The 3 labs Montana certifies closest to the area Golden Estates Trailer Court serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • DPHHS State of Montana Environmental Laboratory

    Helena, MT · under a mile

    Certified for bacteria, minerals and other inorganics, organic chemicals

    (406) 444-3444

  • Alpine Analytical

    Helena, MT · under a mile

    Certified for bacteria, minerals and other inorganics

    (406) 449-6282

  • Energy Laboratories, Inc.

    Helena, MT · about 10 miles

    Certified for bacteria, minerals and other inorganics, organic chemicals

    (406) 442-0711

Montana State Environmental Laboratory: Private well testing packages for bacteria, metals, nutrients, anions, organic chemicals and more, open to the public. Samples can be mailed, sent by the lab's free courier, or dropped off at the lab. Environmental Laboratory, Montana Department of Public Health and Human Services.

All 36 certified labs for Montana

Sources

PWSID MT0000597. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Lewis and Clark County

All Montana utilities

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