Skip to content
TapBuff
ZIP

Lakeside Water Supply 4

What EPA’s and Texas’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
123 people
Connections
41
Water source
Groundwater
Based in
Colmesneil, TX
County
Tyler
Owner
Private
The ZIP code it serves

75938

The short answer

1 result is above EPA’s legal limit. The worst: Lead, above the action level. 1 health-based violation since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 1995 to 2014.

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 1.7 ppm, for the period ending June 30, 2016. None since is on file, so it is not counted as a current finding.

Nitrate, arsenic, chromium (total), fluoride, haloacetic acids (HAA5) and total trihalomethanes (TTHM): Texas’s own results, samples taken from June 9, 2020 to June 27, 2024, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from May 24, 2018 to May 24, 2018. Newer results are in the utility’s annual water quality report.

Above the legal limit1

Lead

Comes from pipes, often your own

Above the action level

26ppb

90th percentile, 2014

In the latest period, 9 in 10 homes sampled were at or below 26 ppb, above EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027, and this result is at or above that. EPA’s health goal for lead is zero.

What handles it

Below EPA’s limits1

Nitrate

Comes from the source

Below EPA’s limits

0.07ppm

Highest sample; found in 2 of 5

2024: not found

The highest sample, in 2020, was 0.07 ppm, below EPA’s legal limit of 10 ppm. In 2024, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.54 ppm, in 2018.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
6 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Fluoride
  • Haloacetic acids (HAA5)
  • Total trihalomethanes (TTHM)
  • Uranium

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?

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 water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Lead and Copper Rule RevisionsThe required inventory of lead service lines was not completed or submitted on time.EPA: LSL InventoryOct. 17, 2024—Addressed
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 108 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Nitrate, arsenic, chromium (total), fluoride, haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium comes from EPA’s file alone, which ends in 2019. Lakeside Water Supply 4’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; Texas’s results run from June 9, 2020 to June 27, 2024; EPA’s compliance samples are from May 24, 2018 to May 24, 2018.

Testing your own tap

Lakeside Water Supply 4’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 Texas certifies.

The 3 labs Texas certifies closest to the area Lakeside Water Supply 4 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Eastex Environmental Lab, Inc.-Nacogdoches

    Nacogdoches, TX · about 44 miles

    Certified for bacteria

    (936) 569-8879

  • Eastex Environmental Lab, Inc. -Coldspring

    Coldspring, TX · about 52 miles

    Certified for bacteria, lead and copper

    (936) 653-3249

  • Chaparral Laboratories, Inc.

    Huntsville, TX · about 72 miles

    Certified for bacteria, lead and copper

    (936) 291-1881

Texas Well Owner Network, Texas A&M AgriLife Extension: Well Informed screening events, where well owners bring in water samples to be screened for common contaminants, followed by an hour-long session explaining the results. Upcoming events are on the network's calendar. Trainings, Texas Well Owner Network.

All 80 certified labs for Texas

Sources

PWSID TX2290041. Rebuilt from EPA data on Oct. 18, 2026.

Also in Tyler County

All Texas utilities

What to do next