City of Somerville

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: 1,556 people
Connections: 781
Water source: Groundwater
Based in: Somerville, TX
County: Burleson
Owner: Local government

The ZIP code it serves

77879

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 March 12, 2020 to Sept. 17, 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

64.7ppb

Highest yearly average, 2020 to 2026

2026 average: 6.3 ppb

Averaged by year, the highest was 64.7 ppb, in 2021, below EPA’s legal limit of 80 ppb. Its highest single sample was 79.1 ppb. In 2026, the latest year on file, its four samples averaged 6.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 84.7 ppb, in 2017, and EPA recorded a violation in 2018.

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

26ppb

Highest yearly average, 2020 to 2026

2026 average: 3.5 ppb

Averaged by year, the highest was 26 ppb, in 2021, below EPA’s legal limit of 60 ppb. Its highest single sample was 32.4 ppb. In 2026, the latest year on file, its four samples averaged 3.5 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 42.5 ppb, in 2017.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.61ppm

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.61 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.62 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
TTHM	The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average	July 1, 2018 to Sept. 30, 2018	0.081 MG/L	Resolved
TTHM	The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average	April 1, 2018 to June 30, 2018	0.083 MG/L	Resolved
TTHM	The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average	Jan. 1, 2018 to March 31, 2018	0.086 MG/L	Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record.

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. City of Somerville’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 12, 2020 to Sept. 17, 2026.

Testing your own tap

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

Aqua-Tech Laboratories, Inc.
Bryan, TX · about 19 miles
Certified for bacteria, lead and copper
(979) 778-3707
R&C Joy, Inc.
Katy, TX · about 60 miles
Certified for bacteria
(281) 858-5988
Chaparral Laboratories, Inc.
Huntsville, TX · about 63 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