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City of Monument

What EPA’s and CDC’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
115 people
Connections
91
Water source
Groundwater influenced by surface water
Based in
Monument, OR
County
Grant
Owner
Local government
The ZIP code it serves

97864

The short answer

1 result is above EPA’s legal limit, and 3 more are above the health goal. The worst: Copper, above the action level. 8 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2004 to 2022.

Uranium, haloacetic acids (HAA5), total trihalomethanes (TTHM) and nitrate: Oregon’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2023, with EPA’s 2012 to 2019 file for earlier years.

Arsenic, chromium (total) and fluoride: EPA’s compliance monitoring file, samples taken from March 7, 2012 to June 4, 2014. Newer results are in the utility’s annual water quality report.

Above the legal limit1

Copper

Comes from pipes, often your own

Above the action level

2.1ppm

90th percentile, 2020 to 2022

In the latest period, 9 in 10 homes sampled were at or below 2.1 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Above the health goal3

Arsenic

Comes from the source

Above the health goal

1.5ppb

Highest yearly average, 2012 to 2014

2014, one sample: 1.1 ppb

Averaged by year, the highest was 1.5 ppb, in 2012: below EPA’s legal limit of 10 ppb, but above its health goal of zero. In 2014, the latest year on file, its one sample was 1.1 ppb.

What handles it

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

Lead

Comes from pipes, often your own

Above the health goal

0.91ppb

90th percentile, 2025

In the latest period, 9 in 10 homes sampled were at or below 0.91 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Uranium

Comes from the source

Above the health goal

0.6ppb

Highest yearly average, 2020

Averaged by year, the highest was 0.6 ppb, in 2020: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That is the only year on file.

What handles it

Below EPA’s limits3

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

27.6ppb

Highest yearly average, 2020 to 2023

2023 average: 4.9 ppb

Averaged by year, the highest was 27.6 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2023, the latest year on file, it averaged 4.9 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 30.9 ppb, in 2012.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

33.1ppb

Highest yearly average, 2020 to 2023

2023 average: 26.8 ppb

Averaged by year, the highest was 33.1 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2023, the latest year on file, it averaged 26.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 44.1 ppb, in 2016.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Nitrate

Comes from the source

Below EPA’s limits

1.3ppm

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 1.3 ppm, in 2023, below EPA’s legal limit of 10 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.0 ppm, in 2017.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Fluoride

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

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

    For: Copper, Arsenic, Lead

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

  • NSF/ANSI 58

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

    For: Copper, Arsenic, Lead, Uranium

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

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. 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

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)Aug. 1, 2025 to Aug. 31, 2025—Resolved
Lead and Copper RuleA required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/RecommendationApril 1, 2021—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)Aug. 1, 2020 to Aug. 31, 2020—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)July 1, 2019 to July 31, 2019—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)March 1, 2019 to March 31, 2019—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)March 1, 2019 to March 31, 2019—Resolved
Surface Water Treatment RuleWater drawn from a river, lake or reservoir was not filtered as required.EPA: Failure to Filter (SWTR)Jan. 1, 2017—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)Feb. 1, 2016 to Feb. 29, 2016—Archived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 36 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Uranium, haloacetic acids (HAA5), total trihalomethanes (TTHM) and nitrate results here are Oregon’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Arsenic, chromium (total) and fluoride come from EPA’s file alone, which ends in 2019. City of Monument’s own annual report, which it must send you every year, has newer results for those and 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; CDC’s yearly averages for Oregon cover 2020 to 2023; EPA’s compliance samples are from March 7, 2012 to June 4, 2014.

Testing your own tap

City of Monument’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 Oregon certifies.

The 3 labs Oregon certifies closest to the area City of Monument serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Pendleton Wastewater Treatment Plant

    Pendleton, OR · about 67 miles

    Certified for bacteria

    (541) 276-3372

  • Umpqua Research Company - Table Rock

    Pendleton, OR · about 67 miles

    Certified for bacteria, nitrate

    (541) 863-7335

  • Box R Water Analysis Laboratory, L.L.C.

    Prineville, OR · about 72 miles

    Certified for bacteria, nitrate

    (412) 603-1990

Oregon State University Extension Well Water Program: Nitrate screening of well water at many of its groundwater education events. The screening is free. Water Testing Guidance for Private Wells, OSU Well Water Program.

All 91 certified labs for Oregon

Sources

PWSID OR4100541. Rebuilt from EPA data on Oct. 18, 2026.

Nearby

All Oregon utilities

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