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.
0
health-based violations
29
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
| MR | Monitoring | Archived | 2021-01-01 → 2023-12-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| Pfba | 0.0086 µg/L | 1/11 | 2025 |
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 | 165.7 µg/L 13% of the EPA limit 1300 µg/L
worst single sample: 512 µg/L | 87/105 | SYR4 | 2013–2018 |
| Lead | 12.4 µg/L 83% of the EPA limit 15 µg/L
worst single sample: 50.4 µg/L | 61/105 | SYR4 | 2013–2018 |
| Nitrate | 860 µg/L 8.6% of the EPA limit 10000 µg/L
worst single sample: 890 µg/L | 44/48 | SYR4 | 2012–2019 |
| Chloroform | 13.63 µg/L No EPA limit set
worst single sample: 14.8 µg/L | 19/36 | SYR4 | 2012–2019 |
| Bromodichloromethane | 2.545 µg/L No EPA limit set
worst single sample: 2.8 µg/L | 18/36 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 23.165 µg/L No EPA limit set
worst single sample: 24.4 µg/L | 14/15 | SYR4 | 2013–2019 |
| TTHM | 15.975 µg/L 20% of the EPA limit 80 µg/L
worst single sample: 17.6 µg/L | 14/15 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 30.41 µg/L 51% of the EPA limit 60 µg/L
worst single sample: 32.1 µg/L | 14/15 | SYR4 | 2013–2019 |
| Trichloroacetic Acid | 4.675 µg/L No EPA limit set
worst single sample: 5 µg/L | 14/15 | SYR4 | 2013–2019 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2024 |
| Atrazine | 0.5405 µg/L 18% of the EPA limit 3 µg/L
worst single sample: 0.6000 µg/L | 8/17 | SYR4 | 2012–2019 |
| Nitrate-Nitrite | 844 µg/L 8.4% of the EPA limit 10000 µg/L
worst single sample: 900 µg/L | 8/9 | SYR4 | 2012–2015 |
| Lithium | 15.6 µg/L No EPA limit set | 8/12 | UCMR-5 | 2025 |
| Barium | 351.5 µg/L 18% of the EPA limit 2000 µg/L
worst single sample: 361 µg/L | 6/6 | SYR4 | 2014–2019 |
| Simazine | 0.2400 µg/L 6% of the EPA limit 4 µg/L | 5/17 | SYR4 | 2012–2019 |
| Xylenes, Total | 2.38 µg/L 0% of the EPA limit 10000 µg/L
worst single sample: 2.6 µg/L | 5/21 | SYR4 | 2012–2019 |
| Fluoride | 167 µg/L 4.2% of the EPA limit 4000 µg/L
worst single sample: 170 µg/L | 4/6 | SYR4 | 2014–2017 |
| Monochloroacetic Acid | 2.785 µg/L No EPA limit set
worst single sample: 2.8 µg/L | 4/15 | SYR4 | 2013–2019 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L | 3/9 | SYR4 | 2012–2015 |
| Arsenic | 4.7 µg/L 47% of the EPA limit 10 µg/L | 2/6 | SYR4 | 2014–2019 |
| Cyanide | 134 µg/L 67% of the EPA limit 200 µg/L
worst single sample: 140 µg/L | 2/6 | SYR4 | 2014–2017 |
| Toluene | 0.9750 µg/L 0.1% of the EPA limit 1000 µg/L
worst single sample: 1 µg/L | 2/21 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 2.3 pCi/L 46% of the EPA limit 5 pCi/L | 1/2 | SYR4 | 2014 |
| Combined Uranium | 1.8 µg/L 6% of the EPA limit 30 µg/L | 1/3 | SYR4 | 2014–2017 |
| Di(2-ethylhexyl) Phthalate | 0.6600 µg/L 11% of the EPA limit 6 µg/L | 1/17 | SYR4 | 2012–2019 |
| Gross Alpha, Excl. Radon And U | 3 pCi/L 20% of the EPA limit 15 pCi/L | 1/3 | SYR4 | 2014–2017 |
82 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDibromoacetic AcidDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Harris County Wcid 109
Is Harris County Wcid 109 tap water safe to drink?
EPA monitoring detected 27 contaminants in Harris County Wcid 109'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 Harris County Wcid 109's water?
EPA monitoring detected Copper, Lead, Nitrate, Chloroform, Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does Harris County Wcid 109 serve?
Harris County Wcid 109 reports serving 10,134 people in Texas, per its EPA record.
Has Harris County Wcid 109 had any water quality violations?
The EPA has 29 violations on file for Harris County Wcid 109, 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.