Compliance record
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
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 |
|---|---|---|---|---|
| Chloroform | 16.245 µg/L No EPA limit set
worst single sample: 19.9 µg/L | 52/52 | SYR4 | 2012–2019 |
| Bromodichloromethane | 3.25 µg/L No EPA limit set
worst single sample: 3.9 µg/L | 51/52 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 23.4 µg/L No EPA limit set
worst single sample: 30.1 µg/L | 47/47 | SYR4 | 2012–2019 |
| TTHM | 17.81 µg/L 22% of the EPA limit 80 µg/L
worst single sample: 23.2 µg/L | 47/47 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 29.23 µg/L 49% of the EPA limit 60 µg/L
worst single sample: 37.5 µg/L | 47/47 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 3.8 µg/L No EPA limit set
worst single sample: 4 µg/L | 47/47 | SYR4 | 2012–2019 |
| Copper | 33.125 µg/L 2.5% of the EPA limit 1300 µg/L
worst single sample: 170 µg/L | 46/53 | SYR4 | 2013–2019 |
| Monochloroacetic Acid | 5.55 µg/L No EPA limit set
worst single sample: 8.1 µg/L | 16/47 | SYR4 | 2012–2019 |
| Nitrate | 1190 µg/L 12% of the EPA limit 10000 µg/L | 16/16 | SYR4 | 2012–2019 |
| Atrazine | 0.6900 µg/L 23% of the EPA limit 3 µg/L
worst single sample: 0.8600 µg/L | 11/12 | SYR4 | 2012–2019 |
| Lead | 0.0012 mg/L 8% of the EPA limit 0.0150 mg/L | 9/9 | LCR | 2025 |
| Simazine | 0.2875 µg/L 7.2% of the EPA limit 4 µg/L
worst single sample: 0.3000 µg/L | 6/12 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 1.625 µg/L No EPA limit set
worst single sample: 1.7 µg/L | 4/47 | SYR4 | 2012–2019 |
| Dibromochloromethane | 1.6 µg/L No EPA limit set | 4/52 | SYR4 | 2012–2019 |
| Bromoform | 1.1 µg/L No EPA limit set | 3/52 | SYR4 | 2012–2019 |
| Lead | 6.65 µg/L 44% of the EPA limit 15 µg/L
worst single sample: 7.1 µg/L | 3/53 | SYR4 | 2013–2019 |
| Nitrate-Nitrite | 958 µg/L 9.6% of the EPA limit 10000 µg/L
worst single sample: 990 µg/L | 3/3 | SYR4 | 2012–2015 |
| Barium | 88.79 µg/L 4.4% of the EPA limit 2000 µg/L
worst single sample: 90.3 µg/L | 2/2 | SYR4 | 2014–2017 |
| Di(2-ethylhexyl) Phthalate | 1.841 µg/L 31% of the EPA limit 6 µg/L
worst single sample: 1.9 µg/L | 2/12 | SYR4 | 2012–2019 |
| Cyanide | 60 µg/L 30% of the EPA limit 200 µg/L | 1/2 | SYR4 | 2014–2017 |
| Fluoride | 370 µg/L 9.3% of the EPA limit 4000 µg/L | 1/2 | SYR4 | 2014–2017 |
| Methoxychlor | 0.1400 µg/L 0.4% of the EPA limit 40 µg/L | 1/12 | SYR4 | 2012–2019 |
| Nitrite | 20 µg/L 2% of the EPA limit 1000 µg/L | 1/3 | SYR4 | 2012–2015 |
80 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, TotalArsenicAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMonobromoacetic AcidNetfosaaNfdhaNmefosaaOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about Harris County Mud 86
Is Harris County Mud 86 tap water safe to drink?
EPA monitoring detected 25 contaminants in Harris County Mud 86'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 Mud 86's water?
EPA monitoring detected Chloroform, Bromodichloromethane, Dichloroacetic Acid, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Harris County Mud 86 serve?
Harris County Mud 86 reports serving 5,397 people in Texas, per its EPA record.
Has Harris County Mud 86 had any water quality violations?
The EPA has no formal drinking-water violations on file for Harris County Mud 86.
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.