Top 4 Things You May Not Know About TOC Analyzers

1. The U.S. Environmental Protection Agency’s Disinfectant Byproduct Rule was enacted in stages beginning in the late 1990s, as part of the Clean Water Act. The regulation holds water utilities responsible for characterizing their product for levels of disinfection byproducts (DBPs), which form when disinfectants are used to control microbial pathogens. Over 260 million Americans are exposed to DBPs. Specifically, the rule tightens compliance monitoring requirements for trihalomethanes (THMs) and haloacetic acids (HAAs), and has been a boon for TOC monitoring.

2. In recent years, there has also been increased attention to online TOC, or grab-sampling, to get a better handle on levels of such contaminants in drinking water.

3. HAA and THM problems are seasonal, arising mostly during warm months when algal or bacterial blooms are most likely and water companies are more inclined to use disinfectants. TOC is not the only way to quantify these compounds. GC-MS systems and dedicated THM analyzers are two other technologies that can do so.

4. HAAs and THMs aren’t the only consequence of bacterial or algal blooms. When microorganisms die, they release compounds that produce disagreeable odors, even in the ppb concentration range, creating a tough environment for water plants to master. TOC is a good indicator of what’s coming into those plants.

For the Top 5 Questions You Should Ask When Buying a TOC Analyzer, click here.

Need more help in finding the right TOC analyzer for you? Check out our TOC Analyzer Product Finder.

Recently Released Balances

Sievers M9 TOC Analyzer

  • Designed to measure TOC in a broad range of samples from ultrapure water to process waters
  • Enhances productivity by producing TOC results in two minutes, twice as fast as its predecessor
  • Offered in three versions: portable, online or laboratory
  • Can measure conductivity in grab sample or autosampler modes

GE Instruments 

ADI 7010 TOC Analyzer

  • Measures samples ranging from 0 to 500 mg/l; the measurement range can also be extended up to 10,000 mg/l
  • Uses the method of UV persulfate oxidation (complying with the DIN, EPA, ASTM, and NAMUR regulations) and has separate compartments for the electronics and wet end
  • Operated via menus on a touchscreen


OI Analytical 9210P Online TOC Analyzer

  • Provides real time data and visibility of natural organic matter that reacts to form harmful disinfection by-products
  • Obtains data that is comparable and consistent with grab samples analyzed on a laboratory TOC analyzer
  • Allows use of a 5-point calibration, making it fully compliant with USEPA-approved methods 415.3 and SM 5310C


450TOC Portable TOC Analyzer

  • Provides real-time, continuous TOC analysis with instant measurements at any point-of-use
  • Can reduce sampling time by 75% or more with on-the-spot results that eliminate lab analysis delays
  • Meets the stringent requirements of the pharmaceutical, microelectronics, and power industries
  • Allows measurements to be taken at any point where short or long term monitoring may be desirable


Balance Manufacturers

Analytik Jena 

EST Analytical 

GE Analytical Instruments 



Mettler Toledo

OI Analytical (Xylem) 

Parker Balston 


Skalar Analytical 


Thermo Fisher Scientific 

TOC Systems