Pecan Grove – Chromium Results

Chromium is a naturally occurring metallic element. It is found in the ground and in rocks and, when located in water bearing aquifers, it will dissolve into the water. In recent years much attention has been brought to Chromium-6 (hexavalent chromium), which is one type of chromium. Chromium-6 contamination can be naturally occurring or caused by manufacturing processes.

Drinking water quality standards are set by the federal and state regulatory agencies. In Texas these agencies are the EPA and the TCEQ. When a contaminant is shown to cause adverse health effects, these regulatory agencies will set an Maximum Contaminant Level (MCL). MCLs are set at levels that are intended to protect the public health and be technologically and financially achievable for water systems. Currently the EPA and TCEQ have set an MCL of 100 parts per billion (ppb) for Total Chromium. The laboratory method for testing Total Chromium for Drinking Water Standards is required to have a minimum detection limit of 10 ppb. The Total Chromium results for Pecan Grove MUD’s drinking water quality testing have all shown levels of Chromium that are below the minimum detection limit.

The amount of Chromium-6 in the water is included with other types of chromium in the test result for Total Chromium. The EPA and TCEQ have not set an MCL for Chromium-6. However, the EPA is currently conducting a study to evaluate drinking water standards that may result in an MCL for Chromium-6. This EPA study is titled the “Unregulated Contaminant Monitoring Rule” (“UCMR”). This study is being performed by collecting and analyzing samples from drinking water systems around the country for a large variety of contaminants including Chromium-6. Unlike most public water systems in the area, Pecan Grove MUD participates in this study and has collected several samples testing for Chromium-6. The Chromium-6 test results from this study range from 0.236 ppb – 2.69 ppb. The California MCL for Chromium-6 is 10 ppb. While the current MCL for Total Chromium testing has a minimum detection limit of 10 ppb, the testing performed as part of the UCMR is much lower.

Drinking water, including bottled water, may reasonably be expected to contain at least trace amounts of some contaminants. Pecan Grove MUD’s water currently meets and exceeds all state and federal drinking water standards and in fact meets the stricter Chromium-6 standard set in California.

Pecan Grove Chromium Results (PDF)

Water is Safe to Drink

The Fort Bend Sheriff’s Department recently posted a boiled water notice. Please note, THIS DOES NOT apply to Pecan Grove MUD. Our water is safe to drink, as usual.

Update from the President

April 19, 2016 at 12:40 PM

Overnight our operator EDP continued to check local drainage system and all of our pump stations. All was normal, with very little overnight rain. Our drainage system remains at low levels with capacity for another rain event. EDP is continuing to communicate directly with the Fort Bend Emergency Operations Center, which is being manned 24/7. It is indicating that the Brazos River peak prediction is lower by about one foot, from 49.5 to 48.5. It is likely that the confidence level of the prediction model has improved. We are expected to receive more rain later today as a trough of low pressure moves in from the west later today and into the night hours. We could see up to one inch of rain with this system.

All MUD facilities are currently on normal power supply, without the need for use of our emergency backup power generators. EDP is monitoring the flow through the Waste Water Treatment Plant. EDP reports there was some minor electrical damage at water plant #2, but the transfer switch to emergency power is functioning. The automation for the generator transfer switch for the north storm water pump station was also damaged, which will require EDP to operate the switch manually, if needed. There was some minor electrical problems with lift station No. 8, but it will function.

The hydrograph below show the current river levels and the predicted levels. The river reached the stage 2 operation level of 42’ at about 11:00 PM last night. All levee gates are closed with the exception of the FM 359 levee gate. The current level on the Richmond gauge is 43.2’, for reference the attached picture of the outfall channel shows the water level at the flap gates, with a water elevation of 73 feet, picture taken about 45 minutes after the river gauge level show below.

EDP will continue emergency levee operation through tonight and likely tomorrow night. If conditions remain unchanged, the next update will be tomorrow morning.

Thank you for your patience while we operate in emergency conditions. We also have posted recent information from WCA about trash collection, which will be collected as normal today for Tuesday pickups.

Don’t forget to sign up for email blasts through the website so you will get notice of updates. And, most important, stay safe and dry.

Chad Howard, President of Pecan Grove MUD