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Tap water quality report

Castlewood Subdivision

EPA monitoring tested this supplier for 79 contaminants and detected 12. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

79
contaminants tested
12
detected
1,053
people served
3
health-based violations
Texas rankingsLead in TexasPFAS in Texas
Water source
Ground water
Ownership
Private
Counties served
Harris

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.

3
health-based violations
107
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-08-01 → 2010-08-31
MCL Health-based Resolved 2010-08-01 → 2010-08-31
MCL Health-based Resolved 2010-08-01 → 2010-08-31
Other Monitoring Resolved 2022-09-01
Other Monitoring Resolved 2022-09-01
Other Monitoring Resolved 2022-08-01
Other Monitoring Resolved 2022-08-01
MON Monitoring Resolved 2021-08-01 → 2021-08-31
MON Monitoring Resolved 2021-08-01 → 2021-08-31
MON Monitoring Resolved 2021-08-01 → 2021-08-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
75.5 µg/L 5.8%
of the EPA limit 1300 µg/L
worst single sample: 84 µg/L
31/31 SYR4 2012–2019
Nitrate
230 µg/L 2.3%
of the EPA limit 10000 µg/L
 16/16 SYR4 2012–2019
Lead
6.05 µg/L 40%
of the EPA limit 15 µg/L
worst single sample: 7.97 µg/L
13/31 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 9/9 LCR 2025
Fluoride
169 µg/L 4.2%
of the EPA limit 4000 µg/L
worst single sample: 170 µg/L
3/3 SYR4 2012–2018
Nitrate-Nitrite
229 µg/L 2.3%
of the EPA limit 10000 µg/L
worst single sample: 230 µg/L
3/3 SYR4 2013–2019
Barium
267.8 µg/L 13%
of the EPA limit 2000 µg/L
worst single sample: 268 µg/L
2/2 SYR4 2015–2018
Combined Uranium
3.685 µg/L 12%
of the EPA limit 30 µg/L
worst single sample: 3.7 µg/L
2/2 SYR4 2015–2018
Gross Alpha, Excl. Radon And U
6.95 pCi/L 46%
of the EPA limit 15 pCi/L
worst single sample: 7 pCi/L
2/2 SYR4 2015–2018
Arsenic
2.2 µg/L 22%
of the EPA limit 10 µg/L
 1/2 SYR4 2015–2018
Di(2-ethylhexyl) Phthalate
1.1 µg/L 18%
of the EPA limit 6 µg/L
 1/5 SYR4 2016–2019
Selenium
4.3 µg/L 8.6%
of the EPA limit 50 µg/L
 1/2 SYR4 2015–2018
67 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumCombined Radium (-226 And -228)DichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
THOMAS, CAREY, A
Phone
713-574-5953
Email
CTHOMAS@UNDINELLC.COM

Frequently asked questions about Castlewood Subdivision

Is Castlewood Subdivision tap water safe to drink?

EPA monitoring detected 12 contaminants in Castlewood Subdivision'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 Castlewood Subdivision's water?

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

How many people does Castlewood Subdivision serve?

Castlewood Subdivision reports serving 1,053 people in Texas, per its EPA record.

Has Castlewood Subdivision had any water quality violations?

The EPA has 107 violations on file for Castlewood Subdivision, of which 3 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.