Is Sienna Regional Mud Tap Water Safe? Quality Report

Water source: SWP
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	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2020-04-01 → 2020-06-30
MR	Monitoring	Resolved	2014-12-30
MR	Monitoring	Resolved	2014-12-30
MR	Monitoring	Resolved	2013-09-29

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
Fluoride	1750 µg/L 44% of the EPA limit 4000 µg/L worst single sample: 2990 µg/L	36/36	SYR4	2012–2019
Copper	993 µg/L 76% of the EPA limit 1300 µg/L worst single sample: 1470 µg/L	35/37	SYR4	2012–2016
Nitrate	2219 µg/L 22% of the EPA limit 10000 µg/L worst single sample: 2230 µg/L	32/32	SYR4	2012–2019
Lead	59.4 µg/L 396% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 100 µg/L	15/37	SYR4	2012–2016
Bromodichloromethane	19.75 µg/L No EPA limit set worst single sample: 21.1 µg/L	10/11	SYR4	2012–2019
Chloroform	22.95 µg/L No EPA limit set worst single sample: 27 µg/L	10/11	SYR4	2012–2019
Dibromochloromethane	18.81 µg/L No EPA limit set worst single sample: 18.9 µg/L	10/11	SYR4	2012–2019
Bromoform	9.96 µg/L No EPA limit set worst single sample: 12.2 µg/L	8/11	SYR4	2012–2019
Atrazine	0.4350 µg/L 14% of the EPA limit 3 µg/L worst single sample: 0.4500 µg/L	7/12	SYR4	2012–2019
Nitrate-Nitrite	2107.5 µg/L 21% of the EPA limit 10000 µg/L worst single sample: 2230 µg/L	6/6	SYR4	2012–2019
Barium	127.85 µg/L 6.4% of the EPA limit 2000 µg/L worst single sample: 128 µg/L	4/4	SYR4	2015–2018
Gross Beta Particle Activity	7.285 pCi/L No EPA limit set worst single sample: 7.6 pCi/L	4/4	SYR4	2012–2018
Simazine	0.2555 µg/L 6.4% of the EPA limit 4 µg/L worst single sample: 0.2600 µg/L	4/12	SYR4	2012–2019
Dibromoacetic Acid	7.05 µg/L No EPA limit set worst single sample: 7.4 µg/L	3/3	SYR4	2013–2019
Dichloroacetic Acid	7.98 µg/L No EPA limit set worst single sample: 8.3 µg/L	3/3	SYR4	2013–2019
Lead	0.1000 mg/L 667% above the EPA limit of 0.0150 mg/L	3/3	LCR	2016
TTHM	57.42 µg/L 72% of the EPA limit 80 µg/L worst single sample: 58.1 µg/L	3/3	SYR4	2013–2019
Total Haloacetic Acids (HAA5)	19.46 µg/L 32% of the EPA limit 60 µg/L worst single sample: 19.8 µg/L	3/3	SYR4	2013–2019
Trichloroacetic Acid	4.06 µg/L No EPA limit set worst single sample: 4.3 µg/L	3/3	SYR4	2013–2019
Cyanide	179 µg/L 90% of the EPA limit 200 µg/L worst single sample: 180 µg/L	2/4	SYR4	2014–2017
Combined Radium (-226 And -228)	2.545 pCi/L 51% of the EPA limit 5 pCi/L worst single sample: 2.6 pCi/L	2/2	SYR4	2012–2015
Monochloroacetic Acid	7.1 µg/L No EPA limit set	1/3	SYR4	2013–2019
Nitrite	10 µg/L 1% of the EPA limit 1000 µg/L	1/6	SYR4	2012–2019

56 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidOxamylPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

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

Frequently asked questions about Sienna Regional Mud

Is Sienna Regional Mud tap water safe to drink?

EPA monitoring detected 23 contaminants in Sienna Regional 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 Sienna Regional Mud's water?

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

How many people does Sienna Regional Mud serve?

Sienna Regional Mud reports serving 0 people in Texas, per its EPA record.

Has Sienna Regional Mud had any water quality violations?

The EPA has 7 violations on file for Sienna Regional 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.