Skip to content
TapBuff
ZIP

Wikiup MHP

What EPA’s and Colorado’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
2,500 people
Connections
339
Water source
Groundwater
Based in
Lakewood, CO
County
Adams
Owner
Private
Hardness
Soft

The short answer

1 result is above the health goal. The worst: Uranium, above the health goal. 1 health-based violation since 2016.

What handles it

What was found

Uranium, fluoride, chromium (total), total trihalomethanes (TTHM), haloacetic acids (HAA5), arsenic and nitrate: Colorado’s own results, samples taken from March 5, 2020 to Aug. 21, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal1

Uranium

Comes from the source

Above the health goal

0.4ppb

Highest yearly average, 2025

Averaged by year, the highest was 0.4 ppb, in 2025: 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 limits4

Fluoride

Forms or is added in treatment

Below EPA’s limits

2.4ppm

Highest yearly average, 2021 to 2024

2024, one sample: 2.3 ppm

Averaged by year, the highest was 2.4 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. In 2024, the latest year on file, its one sample was 2.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.3 ppm, in 2018.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

4.0ppb

Highest yearly average, 2021

Averaged by year, the highest was 4.0 ppb, in 2021, below EPA’s legal limit of 100 ppb. That is the only year on file.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

1.5ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 1.5 ppb, in 2025, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.3 ppb, in 2012.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.1ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 1.1 ppb, in 2024, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.0 ppb, in 2012.

What handles it

No certification claim covers this compound yet.

3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Lead
  • Nitrate

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.”

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

None of the filters TapBuff has checked so far carry these claims. Search the certifier listings for the claim above.

Compare five-year costs

Hardness

Soft, typically 3.9 mg/L (0.2 grains per gallon), across 2 sampling points, in 2024.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared at 0.2 grains per gallon, salt includedSoftener or salt-free conditioner?Colorado water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyDec. 6, 2025—Unaddressed
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 4 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Uranium, fluoride, chromium (total), total trihalomethanes (TTHM), haloacetic acids (HAA5), arsenic and nitrate results here are Colorado’s own from 2020 on, with EPA’s national file for 2012 to 2019. Wikiup MHP’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; Colorado’s results run from March 5, 2020 to Aug. 21, 2026.

Testing your own tap

Wikiup MHP’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 Colorado certifies.

No lab Colorado certifies is within 75 miles of the area Wikiup MHP serves on the state’s list. Some take samples by mail; the state’s page lists them all.

All 54 certified labs for Colorado

Sources

PWSID CO0101180. Rebuilt from EPA data on Oct. 18, 2026.

Also in Adams County

All Colorado utilities

What to do next