Commodore Cape Water System

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: 264 people
Connections: 105
Water source: Groundwater
Based in: Cypress, TX
County: Polk
Owner: Private

The ZIP code it serves

77351

The short answer

Nothing in EPA’s and Texas’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. 3 health-based violations since 2016.

What was found

Total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, arsenic, chromium (total), nitrate and uranium: Texas’s own results, samples taken from Nov. 17, 2020 to March 2, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits3

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

41.2ppb

Highest yearly average, 2022 to 2025

Averaged by year, the highest was 41.2 ppb, in 2025, below EPA’s legal limit of 80 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 21.5 ppb, in 2016.

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

7.1ppb

Highest yearly average, 2022 to 2025

2025, one sample: 4.8 ppb

Averaged by year, the highest was 7.1 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2025, the latest year on file, its one sample was 4.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 5.5 ppb, in 2016.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.38ppm

Highest yearly average, 2021 to 2024

2024 average: 0.33 ppm

Averaged by year, the highest was 0.38 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.39 ppm. In 2024, the latest year on file, its two samples averaged 0.33 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.46 ppm, in 2012.

What handles it

NSF/ANSI 58 look for “Fluoride Reduction”
NSF/ANSI 53 look for “Fluoride”

5 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Chromium (total)
Lead
Nitrate
Uranium

Violations since 2016

Contaminant or rule	Type	Period	Measured	Status
Lead and Copper Rule	A required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/Recommendation	Oct. 1, 2023	—	Resolved
Lead and Copper Rule	A required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/Recommendation	April 1, 2023	—	Resolved
Lead and Copper Rule	A required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/Recommendation	March 31, 2023	—	Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 29 monitoring or reporting violations not shown.

What this report can’t tell you

Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, arsenic, chromium (total), nitrate and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Commodore Cape Water System’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 Nov. 17, 2020 to March 2, 2026.

Testing your own tap

Commodore Cape Water System’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 Commodore Cape Water System serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Eastex Environmental Lab, Inc. -Coldspring
Coldspring, TX · about 21 miles
Certified for bacteria, lead and copper
(936) 653-3249
Chaparral Laboratories, Inc.
Huntsville, TX · about 44 miles
Certified for bacteria, lead and copper
(936) 291-1881
Nova Biologicals, Inc.
Conroe, TX · about 46 miles
Certified for bacteria
(936) 756-5333

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