Understanding the distinct boundaries between theoretical detection, laboratory capabilities, and reliable quantification ensures defensible water-quality reporting. Master these analytical metrics to select appropriate methods and avoid overstating data certainty in compliance reporting.

Flawless analytical procedures mean little if samples are compromised before testing. Discover how proper container selection, representative collection techniques, and rigorous preservation protocols prevent pre-analysis error to ensure defensible, accurate water quality results.

Achieve defensible testing results by mastering analytical controls. Learn how strategic blank corrections, scheduled primary and secondary standard verifications, and systematic troubleshooting eliminate measurement errors and simplify regulatory compliance across everyday laboratory operations.

Undetected interferences in water analysis lead to reporting errors and costly compliance failures. Learn how to identify sample matrix disruptions using spike-and-recovery testing and apply practical lab techniques to ensure accurate, compliant data.

Manual water testing drains operational hours and increases human error. Transitioning to parallel analysis lets field technicians test multiple parameters simultaneously, reducing testing times by up to 75% while improving field data integrity.

Real-time nutrient monitoring allows wastewater facilities to detect industrial spikes and prevent permit violations. By utilizing automated, hourly sampling and dual-stream analysis, operators can optimize chemical dosing and maintain consistent effluent quality.

Accurate dechlorination control requires monitoring all residual oxidants that threaten membrane integrity. Total chlorine analysis provides the necessary precision at ultra-low levels, ensuring comprehensive protection against oxidative damage while maintaining reagent stability during intermittent system operations.

Eliminate sensor fouling and frequent maintenance in challenging water applications by utilizing inductive sensing technology. This non-contact approach ensures accurate conductivity readings and long-term reliability, even when monitoring aggressive chemicals or high-solid process streams.

Optimize wastewater nitrification by utilizing real-time ammonia monitoring instead of surrogate measurements. Direct visibility into nutrient levels allows for precise aeration control, significantly reducing energy costs and carbon emissions while maintaining strict permit compliance.

Learn how a beverage plant cut its annual Reverse Osmosis reject water hauling volume by 50%. Real-time Total Nitrogen monitoring reduced compliance costs by $350,000 and eliminated discharge penalty risk.

Improve your experience in nitrate measurement with Hach's new NT3100sc sensor. Backed by a legacy of reagent-free UV absorbance technology expertise, Hach's NT3100sc UV Nitrate Sensor is equipped to meet your unique application needs. Whether measuring nitrate in municipal sewage treatment plants, surface water, untreated water or treated drinking water, you’ll have the choice of 3 different path lengths to fit your measurement ranges and turbidity compensation needs.

Water Quality Monitoring Panels offer application specific Hach® sensor and electrode configurations in the convenience of one panel and are pre-engineered, ready to install, simple solutions - that are designed to work together.

Continuous UV 254 Absorbance/Transmittance measurements can be used to protect plant treatment processes from high organic loads. Analysis range of 50 mm probe is 0.01 - 60 m^-1. Use for the following applications: protection of treatment plants from industrial dischargers, monitoring shock loads from internal plant processes, control of activated sludge processes, control methanol feed in BNR based on organic loading, final effluent monitoring and monitoring efficiency of UV disinfection processes.

Built on a legacy of reliability in online chlorine analysis, the advanced design of the CL17sc reduces routine maintenance touch time and provides powerful diagnostic features and enhanced connectivity. The result is less hassle, minimized risk of data loss, and even more reliable information to empower your decision making.

The HQ Series is for water quality professionals who want to perform electrochemical analysis for field and lab environments. Our new portable platform will allow you to collect intuitive, accurate measurements, manage data, and easily review results, while supplying an IP67 robustness rating.

Complete more tests on site, get the results you need faster, allowing you to visit more sites in each shift. Perform up to four colorimetric and two probe-based measurements in parallel 75% faster than with other methods.

The launch of the world’s first ready-to-use reagent packages for photometric analysis in the 1960’s had a substantial effect on water analysis. Today Hach^® TNTplus^® Vial Tests and photometers are indispensable elements of both process control and compliance monitoring.

The DR6000™ is the industry’s most advanced laboratory spectrophotometer for water testing. It offers high-speed wavelength scanning across the UV and Visible Spectrum, and comes with over 250 pre-programmed methods including the most common water and environmental testing methods used today. 

The hand-held DR 900 allows quick and easy access to your most-used testing methods. This colorimeter is waterproof, dustproof and field durable.

Weighing only 28 pounds (12.7 kg), the AS950 Portable Sampler is designed for accuracy and convenience. Quickly switch between composite and discrete sampling in the field. Configurable for single- or multiple-bottle applications, it is specifically designed for use in 18-inch manholes.

The Hach TSS Portable Hand-held Turbidity, Suspended Solids, and Sludge Blanket Level Instrument's unique multi-beam alternating light method with infrared diode system gives it a broad measuring range for both turbidity and suspended solids in one portable handheld instrument.

Compliant with ISO Method 7027-1 and perfect for membrane filtration applications, the TU5400sc employs a patented optical design that sees more of your sample than any other turbidimeter, delivering the best low level precision and sensitivity while minimizing variability between measurements.

Excess ammonia in receiving waters causes algal blooms that decrease oxygen levels. For this reason, many wastewater treatment plants (WWTPs) must limit ammonia in discharge. Mike Rousey, Hach Company

Adjusting chemical dose based on flow or setting a fixed chemical dose can be very expensive. With a system that provides Real-Time Control, you can significantly lower chemical costs, quickly adjust for loading changes, and enjoy the peace of mind in knowing your effluent phosphorus levels are within permit range.

Harboes Bryggeri A/S was facing challenges with the performance of its wastewater treatment plant, due to the highly variable Chemical Oxygen Demand (COD) load in the inlet.