City of Katy (TX) Water Quality

City of Katy is a large public water system in EPA region 6 that provides tap water for the 77493, 77494 zip codes. It has 17 facilities where the water supply was tested for 75 chemical contaminants that impact tap water quality and human health.

The maximum reported level of HAA5 (five regulated haloacetic acids) was 0.682 µg/L. The maximum reported level of Manganese was 20.9 µg/L. There were 2 contamintants found in the City of Katy water supply at levels that were above the minimum reporting level.

Contaminants

1,1-dichloroethane (12)

1,2,3-trichloropropane (12)

1,3-butadiene (12)

1,4-dioxane (12)

1-butanol (10)

11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (12)

1H,1H,2H,2H-perfluorodecane sulfonic acid (12)

1H,1H,2H,2H-perfluorohexane sulfonic acid (12)

1H,1H,2H,2H-perfluorooctane sulfonic acid (12)

2,4-dinitrotoluene (9)

2,6-dinitrotoluene (9)

2-methoxyethanol (10)

2-propen-1-ol (Allyl Alcohol) (10)

4,4'-dichloro dichlorophenyl ethylene (DDE) (9)

4,8-dioxa-3H-perfluorononanoic acid (12)

9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (12)

alpha-hexachlorocyclohexane (10)

bromochloromethane (Halon 1011) (12)

bromomethane (12)

Butylated Hydroxyanisole (10)

chlorate (24)

chlorodifluoromethane (HCFC-22) (12)

chloromethane (12)

chlorpyrifos (10)

chromium (24)

chromium-6 (24)

cobalt (24)

dimethipin (10)

dimethyl tetrachloroterephthalate (DCPA) mono/di-acid degradate (9)

ethoprop (10)

Germanium (10)

HAA5 (five regulated haloacetic acids) (8)

HAA6Br (six brominated haloacetic acids) (8)

HAA9 (nine haloacetic acids) (8)

hexafluoropropylene oxide dimer acid (GenX) (12)

lithium (12)

Manganese (10)

methyl-tertiary-butyl-ether (MTBE) (9)

molinate (9)

molybdenum (24)

N-ethyl perfluorooctanesulfonamidoacetic acid (12)

N-methyl perfluorooctanesulfonamidoacetic acid (12)

nitrobenzene (9)

nonafluoro-3,6-dioxaheptanoic acid (12)

o-toluidine (10)

oxyfluorfen (10)

perchlorate (9)

perfluoro(2-ethoxyethane)sulfonic acid (12)

perfluoro-3-methoxypropanoic acid (12)

perfluoro-4-methoxybutanoic acid (12)

perfluorobutanesulfonic acid (24)

perfluorobutanoic acid (12)

perfluorodecanoic acid (12)

perfluorododecanoic acid (12)

perfluoroheptanesulfonic acid (12)

perfluoroheptanoic acid (24)

perfluorohexanesulfonic acid (24)

perfluorohexanoic acid (12)

perfluorononanoic acid (24)

perfluorooctanesulfonic acid (24)

perfluorooctanoic acid (24)

perfluoropentanesulfonic acid (12)

perfluoropentanoic acid (12)

perfluorotetradecanoic acid (12)

perfluorotridecanoic acid (12)

perfluoroundecanoic acid (12)

profenofos (10)

quinoline (10)

s-ethyl-dipropylthiocarbamate (EPTC) (9)

strontium (24)

tebuconazole (10)

terbacil (9)

Total Permethrin (10)

tribufos (10)

vanadium (24)

Sampling Facilities

Plant 2/Well 9
Ground Water (GW)

5450 Franz Rd.Entry Point to the Distribution System (EP)

Plant 3/ Well 5
Ground Water (GW)

25815 Kingsland Blvd.Entry Point to the Distribution System (EP)

Plant 4/ Well 6
Ground Water (GW)

6850 Franz Rd.Entry Point to the Distribution System (EP)

Plant 5/ Well 7
Ground Water (GW)

3300 Katy Hockley Rd.Entry Point to the Distribution System (EP)

Plant 6/ Wells 8 and 9A
Ground Water (GW)

27515 Hwy. Blvd.Entry Point to the Distribution System (EP)

Plant 7/Well 10
Ground Water (GW)

29800 Kingsland BlvdEntry Point to the Distribution System (EP)

Distribution system
Ground Water (GW)

802 EvaDistribution System (DS)

Distribution system
Ground Water (GW)

5318 Little JohnDistribution System (DS)

Distribution system
Ground Water (GW)

905 Ave CDistribution System (DS)

Distribution System
Ground Water (GW)

2808 Ave DDistribution System (DS)

Distribution System
Ground Water (GW)

DSMRT for Plant 1Maximum Residence Time (MR)
DSMRT for Plant 2Maximum Residence Time (MR)
DSMRT for Plant 4Maximum Residence Time (MR)
DSMRT for Plant 3Maximum Residence Time (MR)
DSMRT for Plant 7Maximum Residence Time (MR)
DSMRT for Plant 8Maximum Residence Time (MR)

Plant 1
Ground Water (GW)

Sample Tap @ 909 Ave. BEntry Point to the Distribution System (EP)

912 AVE B
Ground Water (GW)

912_AVE_BEntry Point to the Distribution System (EP)

FRANZ RD EAST
Ground Water (GW)

FRANZ_RD_EASTEntry Point to the Distribution System (EP)

FRANZ RD WEST
Ground Water (GW)

FRANZ_RD_WESTEntry Point to the Distribution System (EP)

PLANT 3
Ground Water (GW)

PLANT_3Entry Point to the Distribution System (EP)

Ground Water (GW)

Entry Point to the Distribution System (EP)

FAQ

Is City of Katy tap water safe to drink?

When was City of Katy last tested for water contamination?

The latest water samples were taken on January 30th, 2025.