Is Block House Mud Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: Williamson

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2013-12-30
Other	Monitoring	Archived	1992-12-01 → 1992-12-31
MR	Monitoring	Archived	1992-12-01 → 1992-12-31
MR	Monitoring	Archived	1991-09-01 → 1991-09-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).

Contaminant	Max	Detection rate	Period
Pfba	0.0050 µg/L	1/3	2023

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Bromodichloromethane	27.9 µg/L No EPA limit set	63/63	SYR4	2012–2019
Chloroform	38.5 µg/L No EPA limit set	63/63	SYR4	2012–2019
Dibromochloromethane	20.5 µg/L No EPA limit set	63/63	SYR4	2012–2019
Dichloroacetic Acid	19.7 µg/L No EPA limit set	63/63	SYR4	2012–2019
TTHM	88 µg/L 110% of the EPA limit, in the worst sample — 80 µg/L	63/63	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	41.8 µg/L 70% of the EPA limit 60 µg/L	63/63	SYR4	2012–2019
Trichloroacetic Acid	12.9 µg/L No EPA limit set	63/63	SYR4	2012–2019
Bromoform	6.6 µg/L No EPA limit set	62/63	SYR4	2012–2019
Dibromoacetic Acid	8.6 µg/L No EPA limit set	62/63	SYR4	2012–2019
Copper	752 µg/L 58% of the EPA limit 1300 µg/L	60/60	SYR4	2013–2017
Lead	2.93 µg/L 20% of the EPA limit 15 µg/L	18/60	SYR4	2013–2017
Lead	0.00084 mg/L 5.6% of the EPA limit 0.0150 mg/L	14/14	LCR	2023
Monochloroacetic Acid	4.3 µg/L No EPA limit set	11/63	SYR4	2012–2019
Monobromoacetic Acid	1.9 µg/L No EPA limit set	7/63	SYR4	2012–2019
Lithium	9.26 µg/L No EPA limit set	1/4	UCMR-5	2023

28 contaminants tested, none detected

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Utility contact

Contact: LOGAN, URSULA
Phone: 512-259-6512
Email: ursula@blockhousemudtx.gov

Frequently asked questions about Block House Mud

Is Block House Mud tap water safe to drink?

EPA monitoring detected 16 contaminants in Block House Mud's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Block House Mud's water?

EPA monitoring detected Bromodichloromethane, Chloroform, Dibromochloromethane, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Block House Mud serve?

Block House Mud reports serving 6,618 people in Texas, per its EPA record.

Has Block House Mud had any water quality violations?

The EPA has 4 violations on file for Block House Mud, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.