Guidebook to Assist Agricultural Water Suppliers to Prepare a 2015 Agricultural Water Management Plan

California Department of Water Resources (DWR) | July 20th, 2015

The document titled “A Guidebook to Assist Agricultural Water Suppliers to Prepare a 2015 Agricultural Water Management Plan” (Guidebook) was prepared by the Californ

The document titled “A Guidebook to Assist Agricultural Water Suppliers to Prepare a 2015 Agricultural Water Management Plan” (Guidebook) was prepared by the California Department of Water Resources (DWR) to assist agricultural water suppliers in understanding and complying with the requirements of the SB X7-7- Water Conservation Act (Steinberg Statute of 2009), (Section I, Part 2.55, Division 6 of the California Water Code), the associated Agricultural Water Management Planning Act (Section I, Part 2.8, Division 6 of the Water Code), the Agricultural Water Measurement Regulation (Title 23 California Code of Regulations), and Executive Order B-29-15. It is meant to help agricultural water suppliers better understand the Water Code Agricultural Water Management Plan (AWMP) requirements and assist them in developing an AWMP. This Guidebook also describes how water conservation plans submitted to the U.S. Bureau of Reclamation (USBR) can be supplemented to satisfy the Water Code and Agricultural Water Measurement Regulation requirements.

Guidebook to Assist Urban Water Suppliers to Prepare a 2010 Urban Water Management Plan

California Department of Water Resources (DWR) | March 17th, 2011

Guidebook to Assist Urban Water Suppliers to Prepare a 2010 Urban Water Management Plan (Guidebook) has been developed by the California Department of Water Resources (

Guidebook to Assist Urban Water Suppliers to Prepare a 2010 Urban Water Management Plan (Guidebook) has been developed by the California Department of Water Resources (DWR) to assist urban water suppliers in complying with requirements of the Urban Water Management Planning Act (the UWMP Act) and the Water Conservation Bill of 2009. It is meant to help suppliers better understand UWMP Act requirements, but water suppliers are solely responsible for ensuring they’ve complied with the requirements of the UWMP Act or applicable laws. For the purposes of this Guidebook and the UWMP Act, urban water suppliers with 3,000 or more service connections or supplying 3,000 or more acre-feet of water per year are to prepare a UWMP every five years.

Guidebook to studies of land subsidence due to ground-water withdrawal

United Nations Educational, Scientific and Cultural Organization (UNESCO) | July 1st, 1984

Guideline levels for PFOA and PFOS in drinking water: the role of scientific uncertainty, risk assessment decisions, and social factors

Journal of Exposure Science & Environmental Epidemiology (Springer) | January 8th, 2019

Communities across the U.S. are discovering drinking water contaminated by perfluoroalkyl and polyfluoroalkyl substances (PFAS) and determining appropriate actions. Ther

Communities across the U.S. are discovering drinking water contaminated by perfluoroalkyl and polyfluoroalkyl substances (PFAS) and determining appropriate actions. There are currently no federal PFAS drinking water standards despite widespread drinking water contamination, ubiquitous population-level exposure, and toxicological and epidemiological evidence of adverse health effects. Absent federal PFAS standards, multiple U.S. states have developed their own healthbased water guideline levels to guide decisions about contaminated site cleanup and drinking water surveillance and treatment. We examined perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) water guideline levels developed by the U.S. Environmental Protection Agency (EPA) and state agencies to protect people drinking the water, and summarized how and why these levels differ. We referenced documents and tables released in June 2018 by the Interstate Technology and Regulatory Council (ITRC) to identify states that have drinking water and groundwater guideline levels for PFOA and/or PFOS that differ from EPA’s health advisories (HAs). We also gathered assessment documents from state websites and contacted state environmental and health agencies to identify and confirm current guidelines. Seven states have developed their own water guideline levels for PFOA and/or PFOS ranging from 13 to 1000 ng/L, compared to EPA’s HA of 70 ng/L for both compounds individually or combined. We find that the development of PFAS guideline levels via exposure and hazard assessment decisions is influenced by multiple scientific, technical, and social factors, including managing scientific uncertainty, technical decisions and capacity, and social, political, and economic influences from involved stakeholders. Assessments by multiple states and academic scientists suggest that EPA’s HA is not sufficiently protective. The ability of states to develop their own guideline levels and standards provides diverse risk assessment approaches as models for other state and federal regulators, while a sufficiently protective, scientifically sound, and enforceable federal standard would provide more consistent protection.

Guidelines for Considering Traditional Knowledges in Climate Change Initiatives

California Department of Water Resources (DWR) | September 9th, 2014

This publication is meant to be an informational resource for tribes, agencies, and organizations across the United States with an interest in understanding Traditional K

This publication is meant to be an informational resource for tribes, agencies, and organizations across the United States with an interest in understanding Traditional Knowledges (TKs) in the context of climate change. It is meant to inspire dialogue and questions, and to foster opportunities for indigenous peoples and non-indigenous partners to braid TKs and western science in culturally-appropriate and tribally-led initiatives. The publication establishes firmly that in all possible cases it is tribes who should ultimately decide answers to specific questions about whether English-language words such as “traditional knowledges” are the best words to use, what knowledges should count as significant to their cultures and communities, and what the terms of sharing or declining to share should be. The information presented in these Guidelines is believed to be current as of the time of production. The Guidelines are a work in progress. The workgroup anticipates revising it over time.

Guidelines for Determining Flood Flow Frequency Bulletin 17C

U.S. Geological Survey (USGS) | May 1st, 2019

Guidelines for Preparing Economic Analyses

U.S. Environmental Protection Agency (EPA) | May 30th, 2014

The Guidelines for Preparing Economic Analyses are part of a continuing effort by U.S. Environmental Protection Agency (EPA) to develop improved guidance on the preparati

The Guidelines for Preparing Economic Analyses are part of a continuing effort by U.S. Environmental Protection Agency (EPA) to develop improved guidance on the preparation and use of sound science in support of the decision-making process. This document builds on previous work first issued in December of 1983 as the Guidelines for Performing Regulatory Impact Analysis (U.S. EPA 1983) and later revised in the late 1990s. In September of 2000, the EPA issued its Guidelines for Preparing Economic Analyses (Guidelines) (U.S. EPA 2000b), revised to reflect the evolution of environmental policy making and economic analysis that had accrued over the decade and a half since the original guidelines were released. At the time of release, EPA committed to periodically revise the Guidelines to account for further growth and development of economic tools and practices. In an effort to fulfill that commitment, this document incorporates new literature published since the last revision of the Guidelines. It describes new Executive Orders (EOs) and recent guidance documents that impose new requirements on analysts, and fills information gaps by providing more expansive information on selected topics. Furthermore, a loose-leaf format has been adopted to facilitate the incorporation of new information in the future. This new, more flexible format, in addition to the electronic release of the document, will allow future updates and additions without requiring a wholesale revision of the document.

Guidelines for salmonid passage at stream crossings

National Marine Fisheries Service (NMFS) | August 20th, 2013

This document provides guidelines for design of stream crossings to aid upstream and downstream passage of migrating salmonids. It is intended to facilitate the design of

This document provides guidelines for design of stream crossings to aid upstream and downstream passage of migrating salmonids. It is intended to facilitate the design of a new generation of stream crossings, and assist the recovery of threatened and endangered salmon species. These guidelines are offered by the National Marine Fisheries Service, Southwest Region (NMFS-SWR), as a result of its responsibility to prescribe fishways under the Endangered Species Act, the Magnuson-Stevens Act, the Federal Power Act, and the Fish and Wildlife Coordination Act. The guidelines apply to all public and private roads, trails, and railroads within the range of anadromous salmonids in California.

Guidelines for the Small Community Drought Relief Program

California Department of Water Resources (DWR) | September 20th, 2022

Guidelines to NOAA Fisheries Staff for the Evaluation of Sediment Removal Actions from California Streams

National Marine Fisheries Service (NMFS) | April 19th, 2004

The National Marine Fisheries Service (NOAA Fisheries) is responsible for protecting, managing, and conserving marine, estuarine, and anadromous fish resources and their

The National Marine Fisheries Service (NOAA Fisheries) is responsible for protecting, managing, and conserving marine, estuarine, and anadromous fish resources and their habitats under various legal authorities (Appendix 1). A guidance document specific to the NOAA Fisheries Southwest Region (SWR) for instream sediment removal is appropriate, because such actions have the potential to adversely affect all life stages of listed salmonids and because sediment removal actions are widespread in California streams. The scientific literature documents that instream gravel mining operations and salmonids are often attracted to the same locations. The effects of instream gravel mining and channel maintenance have been widely recognized as potential impacts to aquatic resources. At least 13 states and 8 foreign countries have implemented restrictions or prohibitions on commercial sediment excavation from fish-bearing streams. Oregon and Washington have reallocated their aggregate  resource production from streams to predominantly floodplains and geologic deposits. Aggregate production in California is focused primarily on streams. The annual aggregate extraction in California is estimated to exceed natural replenishment by an order of magnitude. In California the demand for high-quality aggregate materials is high because of a rapidly growing population, expanding industry, and the geologic nature of the most populous areas. NOAA Fisheries anticipates that pressures for stream-derived aggregates will continue to increase in the SWR. This convergence of geology and accelerating market demand has significant implications for the conservation and recovery of the freshwater habitats entrusted to NOAA Fisheries.