El Sauz WSC (TX) Water Quality

El Sauz WSC is a small public water system in EPA region 6 that provides tap water for the 78584 zip codes. It has 2 facilities where the water supply was tested for 39 chemical contaminants that impact tap water quality and human health.

The maximum reported level of microcystin-LF was 0.0066 µg/L. The maximum reported level of microcystin-LR was 0.079 µg/L. The maximum reported level of microcystin-RR was 0.15 µg/L. There were 3 contamintants found in the El Sauz WSC water supply at levels that were above the minimum reporting level.

Table of Contents
Contaminants
Facilities
FAQ

Contaminants

Jump To Contaminant
11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (1)
1H,1H,2H,2H-perfluorodecane sulfonic acid (1)
1H,1H,2H,2H-perfluorohexane sulfonic acid (1)
1H,1H,2H,2H-perfluorooctane sulfonic acid (1)
4,8-dioxa-3H-perfluorononanoic acid (1)
9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (1)
anatoxin-a (7)
cylindrospermopsin (7)
hexafluoropropylene oxide dimer acid (GenX) (1)
lithium (2)
microcystin-LA (1)
microcystin-LF (1)
microcystin-LR (1)
microcystin-LY (1)
microcystin-RR (1)
microcystin-YR (1)
N-ethyl perfluorooctanesulfonamidoacetic acid (2)
N-methyl perfluorooctanesulfonamidoacetic acid (2)
nonafluoro-3,6-dioxaheptanoic acid (1)
perfluoro(2-ethoxyethane)sulfonic acid (1)
perfluoro-3-methoxypropanoic acid (1)
perfluoro-4-methoxybutanoic acid (1)
perfluorobutanesulfonic acid (1)
perfluorobutanoic acid (1)
perfluorodecanoic acid (1)
perfluorododecanoic acid (1)
perfluoroheptanesulfonic acid (1)
perfluoroheptanoic acid (1)
perfluorohexanesulfonic acid (1)
perfluorohexanoic acid (1)
perfluorononanoic acid (1)
perfluorooctanesulfonic acid (1)
perfluorooctanoic acid (1)
perfluoropentanesulfonic acid (1)
perfluoropentanoic acid (1)
perfluorotetradecanoic acid (2)
perfluorotridecanoic acid (2)
perfluoroundecanoic acid (1)
total microcystins (7)

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

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.005 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

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

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.005 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

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

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

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

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.005 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

4,8-dioxa-3H-perfluorononanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

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

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.002 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.002 µg/L
Reference Level: ?

Contaminant Details

anatoxin-a (7)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.03 µg/L

Below Reporting Level

9/24/2020

4 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.03 µg/L

Below Reporting Level

9/9/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.03 µg/L

Below Reporting Level

8/19/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.03 µg/L

Below Reporting Level

8/3/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.03 µg/L

Below Reporting Level

7/21/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.03 µg/L

Below Reporting Level

6/22/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.03 µg/L

Below Reporting Level

6/9/2020

5 years ago

Minimum Reporting Level: 0.03 µg/L
Reference Level: ?

Contaminant Details

cylindrospermopsin (7)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.09 µg/L

Below Reporting Level

9/24/2020

4 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.09 µg/L

Below Reporting Level

9/9/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.09 µg/L

Below Reporting Level

8/19/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.09 µg/L

Below Reporting Level

8/3/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.09 µg/L

Below Reporting Level

7/21/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.09 µg/L

Below Reporting Level

6/22/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.09 µg/L

Below Reporting Level

6/9/2020

5 years ago

Minimum Reporting Level: 0.09 µg/L
Reference Level: 0.7 µg/L

Contaminant Details

hexafluoropropylene oxide dimer acid (GenX) (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.005 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

lithium (2)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

37 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 28 µg/L

4/15/2025

5 months ago

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

36.3 µg/L

⚠️ Exceeds Reporting Level of 9 µg/L by 27.3 µg/L

2/24/2025

6 months ago

Minimum Reporting Level: 9 µg/L
Reference Level: ?

Contaminant Details

microcystin-LA (1)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.008 µg/L

Below Reporting Level

6/22/2020

5 years ago

Minimum Reporting Level: 0.008 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

microcystin-LF (1)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

0.0066 µg/L

Meets Reporting Threshold

6/22/2020

5 years ago

Minimum Reporting Level: 0.006 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

microcystin-LR (1)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

0.079 µg/L

Meets Reporting Threshold

6/22/2020

5 years ago

Minimum Reporting Level: 0.02 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

microcystin-LY (1)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.009 µg/L

Below Reporting Level

6/22/2020

5 years ago

Minimum Reporting Level: 0.009 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

microcystin-RR (1)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

0.15 µg/L

Meets Reporting Threshold

6/22/2020

5 years ago

Minimum Reporting Level: 0.006 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

microcystin-YR (1)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.02 µg/L

Below Reporting Level

6/22/2020

5 years ago

Minimum Reporting Level: 0.02 µg/L
Reference Level: 0.3 µg/L

Contaminant Details

N-ethyl perfluorooctanesulfonamidoacetic acid (2)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.005 µg/L

Below Reporting Level

4/15/2025

5 months ago

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.005 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

N-methyl perfluorooctanesulfonamidoacetic acid (2)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.006 µg/L

Below Reporting Level

4/15/2025

5 months ago

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.006 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.006 µg/L
Reference Level: ?

Contaminant Details

nonafluoro-3,6-dioxaheptanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.02 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.02 µg/L
Reference Level: ?

Contaminant Details

perfluoro(2-ethoxyethane)sulfonic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoro-3-methoxypropanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.004 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoro-4-methoxybutanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorobutanesulfonic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorobutanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.005 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.005 µg/L
Reference Level: ?

Contaminant Details

perfluorodecanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorododecanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoroheptanesulfonic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluoroheptanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorohexanesulfonic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorohexanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorononanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.004 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluorooctanesulfonic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.004 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluorooctanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.004 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoropentanesulfonic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.004 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.004 µg/L
Reference Level: ?

Contaminant Details

perfluoropentanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.003 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.003 µg/L
Reference Level: ?

Contaminant Details

perfluorotetradecanoic acid (2)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.008 µg/L

Below Reporting Level

4/15/2025

5 months ago

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.008 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.008 µg/L
Reference Level: ?

Contaminant Details

perfluorotridecanoic acid (2)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.007 µg/L

Below Reporting Level

4/15/2025

5 months ago

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.007 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.007 µg/L
Reference Level: ?

Contaminant Details

perfluoroundecanoic acid (1)

Sample Tap - Rio Grande POE - Meter Box

Connection to Rio Grande City ℹ️

<0.002 µg/L

Below Reporting Level

2/24/2025

6 months ago

Minimum Reporting Level: 0.002 µg/L
Reference Level: ?

Contaminant Details

total microcystins (7)

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.3 µg/L

Below Reporting Level

9/24/2020

4 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.3 µg/L

Below Reporting Level

9/9/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.3 µg/L

Below Reporting Level

8/19/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.3 µg/L

Below Reporting Level

8/3/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.3 µg/L

Below Reporting Level

7/21/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

0.39 µg/L

⚠️ Exceeds Reporting Level of 0.3 µg/L by 0.09 µg/L

6/22/2020

5 years ago

EP#1 - Master Meter (Merrys Trailer Park)

Sampling Station ℹ️

<0.3 µg/L

Below Reporting Level

6/9/2020

5 years ago

Minimum Reporting Level: 0.3 µg/L
Reference Level: ?

Contaminant Details

Sampling Facilities

Connection to Rio Grande City
Surface Water (SW)

Sample Tap - Rio Grande POE - Meter BoxEntry Point to the Distribution System (EP)

Sampling Station
Surface Water (SW)

EP#1 - Master Meter (Merrys Trailer Park)Entry Point to the Distribution System (EP)

FAQ

Is El Sauz WSC tap water safe to drink?

When was El Sauz WSC last tested for water contamination?

The latest water samples were taken on April 15th, 2025.