Applied Ecosystem Services, LLC

Nonpoint source water pollution adversely impacting a beneficial use is regulated by discharge allocations from a Total Maximum Daily Load. Whether a waterbody requires a TMDL depends on how its condition is assessed. The Clean Water Act, as amended in 1987, specifies using environmental ambient conditions to assess waterbodies, but regulators focus on single chemical ions or compounds based on point source discharge regulations. The limitations of this approach and the benefits of a different approach are explained here.

It is widely accepted that raw data need to be converted to information (commonly by statistical analyses) and the results interpreted to form knowledge before informed decisions can be made. With biological data this process is not followed as frequently as it should. Modern spatial analyses and statistical models can provide valuable and useful information that is otherwise lost. Biological data are counts, presence/absence, proportions, and frequencies. They are not continuous variables with a true zero so the familiar parametric statistics cannot be used.

Every business complying with environmental laws can be profitable and sustainable while operating environmentally responsibly. Environmental aspects may not have the same importance to you as other business aspects, but it’s under your control to avoid issues that can cost time and money better spent elsewhere. You should take action now to limit your risk of costly or damaging environmental issues such as permit compliance enforcement. Acting now is especially important because the future is uncertain and the present is constantly changing.

Current regulation of water quality, based on the statutes they implement, fail to effectively describe the current state of water bodies. There are historical and political reasons for this condition but no excuse to continue as we have for the past almost 60 years. Our understanding of aquatic ecosystems and the development of appropriate statistical models for environmental data provide the means to more effectively regulate water quality to benefit natural ecosystems and human health.

Every business complying with environmental laws can be profitable and sustainable while operating responsibly. Learning how to go beyond minimal permit compliance requirements to avoid regulatory compliance enforcement actions is as important as are other aspects of your job or operations when you are responsible for environmental permits. The rapidly warming climate and resulting more frequent and severe weather patterns such as megadroughts, massive wildland fire, severe flooding, hotter summers, and colder winters affect environmental permit holders in unpredictable ways.

Wetlands are difficult to understand by non-specialists, and by many specialists, too. There are differences among the general public perception of what is a wetland, the definitions used by wetland scientists, and the definitions used by regulators on jurisdictional wetlands. This post is designed to introduce wetland definitions. Wetland water quality is regulated under Section 404 of the Clean Water Act. The definition of wetland used by wetland scientists may not be the same as that used by the wetland regulator.

Much has changed since the Clean Water Act (CWA) was passed in 1972, but not how water quality is regulated. Existing environmental data analyzed with advanced statistical models can bring CWA regulatory compliance into the 21st century. With global warming, and societal concerns about sustainability, modernizing regulatory compliance benefits everyone. The use of maximum concentration limits (MCLs) on individual chemical ions or collections such as total dissolved solids (TDS) applied to all water bodies regardless of type or geographic location is similar to the way medicine was practiced centuries ago when we did not understand human physiology and variability.