Is Sienna Management District Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Fort Bend

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	2014-10-01
MR	Monitoring	Resolved	2014-10-01
MR	Monitoring	Resolved	2014-10-01
MR	Monitoring	Resolved	2014-10-01
MR	Monitoring	Resolved	2013-10-01
MR	Monitoring	Resolved	2013-01-01

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Copper	392.6 µg/L 30% of the EPA limit 1300 µg/L worst single sample: 520 µg/L	15/19	SYR4	2012–2019
Lead	14.4 µg/L 96% of the EPA limit 15 µg/L worst single sample: 20 µg/L	8/19	SYR4	2012–2019
Lead	0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L	5/5	LCR	2025
Bromodichloromethane	14.015 µg/L No EPA limit set worst single sample: 14.2 µg/L	2/2	SYR4	2016–2019
Bromoform	10.7 µg/L No EPA limit set worst single sample: 11 µg/L	2/2	SYR4	2016–2019
Chloroform	8.63 µg/L No EPA limit set worst single sample: 8.9 µg/L	2/2	SYR4	2016–2019
Dibromoacetic Acid	9.03 µg/L No EPA limit set worst single sample: 9.3 µg/L	2/2	SYR4	2016–2019
Dibromochloromethane	17.09 µg/L No EPA limit set worst single sample: 17.2 µg/L	2/2	SYR4	2016–2019
Dichloroacetic Acid	5.615 µg/L No EPA limit set worst single sample: 5.7 µg/L	2/2	SYR4	2016–2019
TTHM	43.055 µg/L 54% of the EPA limit 80 µg/L worst single sample: 43.1 µg/L	2/2	SYR4	2016–2019
Total Haloacetic Acids (HAA5)	20.895 µg/L 35% of the EPA limit 60 µg/L worst single sample: 21.4 µg/L	2/2	SYR4	2016–2019
Trichloroacetic Acid	1.665 µg/L No EPA limit set worst single sample: 1.7 µg/L	2/2	SYR4	2016–2019
Monochloroacetic Acid	7.1 µg/L No EPA limit set	1/2	SYR4	2016–2019

1 contaminants tested, none detected

Monobromoacetic Acid

Utility contact

Contact: BOWLES, CARL, S
Phone: 281-500-6050

Frequently asked questions about Sienna Management District

Is Sienna Management District tap water safe to drink?

EPA monitoring detected 13 contaminants in Sienna Management District'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 Sienna Management District's water?

EPA monitoring detected Copper, Lead, Lead, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Sienna Management District serve?

Sienna Management District reports serving 300 people in Texas, per its EPA record.

Has Sienna Management District had any water quality violations?

The EPA has 6 violations on file for Sienna Management District, 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.