The San Antonio River Authority Laboratory

Upcoming Lab Holiday Closure

The Laboratory will be closed on Friday, April 25, 2014 in observance of San Jacinto Day.  Regular business hours will resume at 8 a.m. on Monday, April 28, 2014.   

The San Antonio River Authority laboratory is a NELAC accredited laboratory that provides a wide range of analyses for drinking water and non-potable water testing. These analyses are available for a small fee to anyone wishing to have their water tested. Current lab customers include:

  • Municipalities
  • Water purveyors
  • Wastewater treatment plants
  • Consultants
  • Water bottlers
  • Other laboratories
  • Private citizens

Analytical Capabilities

Wet Chemistry Analysis:

Total Hardness
Total Phosphorus
Dissolved Phosphorus

Solids Analysis:

Total Suspended Solids
Total Dissolved Solids


Drinking water
Total Coliform (Presence/Absence)
E. coli (Presence/Absence and enumeration)

Non-potable water
E. coli enumeration

The SARA laboratory is capable of performing the IDEXX Colilert®-18 methods for presence/absence and enumeration of Total Coliforms and E. coli.

The Laboratory is also capable of analyzing BOD5, CBOD5, Non Distilled/Distilled Ammonia, Conductivity, Turbidity and pH.

The Laboratory also has the Dionex ICS-2100 and a DX2000 for the analysis of Nitrate, Nitrite, Sulfate, Fluoride, Bromide and Chloride; the TOC Fusion instrument for the analysis of Total Organic Carbon and the SEAL AQ2+ Analyzer for the analysis of Total Kjeldahl Nitrogen. The Laboratory also has an Agilent 7500 CE ICP-MS instrument for the analysis of Metals in drinking water and non-potable water, and a Beckman Coulter Spectrophotometer DU-800 for Chlorophyll-a and Pheophytin-a.

Staff Qualifications

  • The laboratory staff consists of degreed professionals from across the state of Texas and beyond.
  • The ESD staff are members of professional organizations to stay abreast of developing technologies and regulations.
    • The NELAC Institute
    • Alamo Laboratory Analyst Chapter

Laboratory Accreditation

The SARA Environmental Sciences Laboratory is accredited by the Texas Commission on Environmental Quality for the analysis of Drinking Water and Non-Potable water. Please refer to our Fields of Accreditation for Analysis that SARA is accredited to perform.

pdf Fields of Accreditation