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Coles Crossing

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
1,521 people
Connections
507
Water source
Groundwater
Based in
Cypress, TX
County
Chambers
Owner
Private
The ZIP code it serves

77523

The short answer

2 results are above EPA’s legal limit. The worst: Copper, above the action level. 4 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2022.

Total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5), chromium (total), nitrate, arsenic and uranium: Texas’s own results, samples taken from March 19, 2020 to Aug. 10, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit2

Copper

Comes from pipes, often your own

Above the action level

2.2ppm

90th percentile, 2022

In the latest period, 9 in 10 homes sampled were at or below 2.2 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the legal limit

65.3ppb

Highest yearly average, 2020 to 2026

2026 average: 11.6 ppb

Averaged by year, the highest was 65.3 ppb, in 2023, below EPA’s legal limit of 80 ppb. Its highest single sample was 177 ppb. In 2026, the latest year on file, its six samples averaged 11.6 ppb. EPA judges this limit at each sampling point, and recorded violations for total trihalomethanes (TTHM) at this utility in 2022, 2023 and 2024. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 44.3 ppb, in 2019.

What handles it

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

Below EPA’s limits4

Fluoride

Forms or is added in treatment

Below EPA’s limits

3.6ppm

Highest yearly average, 2020 to 2026

2026 average: 2.9 ppm

Averaged by year, the highest was 3.6 ppm, in 2025, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 3.6 ppm. In 2026, the latest year on file, its two samples averaged 2.9 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.8 ppm, in 2019.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

12.7ppb

Highest yearly average, 2020 to 2026

2026 average: 5.6 ppb

Averaged by year, the highest was 12.7 ppb, in 2023, below EPA’s legal limit of 60 ppb. Its highest single sample was 32.6 ppb. In 2026, the latest year on file, its six samples averaged 5.6 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 13.6 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

Chromium (total)

Comes from the source

Below EPA’s limits

5.1ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 5.1 ppb, in 2020, below EPA’s legal limit of 100 ppb. Its highest single sample was 10.2 ppb. In 2026, the latest year on file, it wasn’t found in any of its two samples.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.16ppm

Highest sample; found in 4 of 14

2026: not found

The highest sample, in 2023, was 0.16 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, it wasn’t found in any of its two samples. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.02 ppm, in 2016.

What handles it

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

  • NSF/ANSI 53

    Claims: Copper Reduction, Trihalomethanes (TTHM) Reduction

    For: Copper, Total trihalomethanes (TTHM)

    Other certifiers’ wording: VOC Reduction

  • NSF/ANSI 58

    Claims: Copper Reduction, Trihalomethanes (TTHM) Reduction

    For: Copper, Total trihalomethanes (TTHM)

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

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—Resolved
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2024 to March 31, 20240.091 MG/LResolved
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2023 to Dec. 31, 20230.09 MG/LResolved
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2022 to June 30, 20220.085 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 24 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5), chromium (total), nitrate, arsenic and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Coles Crossing’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; Texas’s results run from March 19, 2020 to Aug. 10, 2026.

Testing your own tap

Coles Crossing’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 Coles Crossing serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • A & B Environmental Services, Inc.

    Houston, TX · about 24 miles

    Certified for bacteria, lead and copper

    (713) 453-6060

  • City of Houston Health Department, Bureau of Laboratory Services

    Houston, TX · about 33 miles

    Certified for bacteria

    (832) 393-3939

  • Water Utility Services, Inc.

    Spring, TX · about 41 miles

    Certified for bacteria

    (281) 290-0704

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 TX0360114. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Chambers County

All Texas utilities

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