Force main sewer lines are a topic of attention here in CT partly because a new force main is being proposed by the Woodridge Lake Sewer District to fix problems with their treatment plant in Goshen by pumping their sewage to an existing sanitary sewer line on the west side of Torrington. Part of that force main would pass through a portion of the watershed of one of Torrington Water Company's reservoirs. Woodridge Lake Sewer District insists that leaks (such as Nantucket's) are very unlikely. The City of Torrington has scheduled a Jan. 31 presentation and a Feb. 20 hearing on the Woodridge Lake Sewer Discharge Permit.
What information is available about the frequency of sanitary sewer failure in Connecticut?
According to DEEP’s Bypass and CSO Events Public Viewer, since September 2016 from 116,993 to 641,250 gallons of sewage spilled into our waterways from places in public wastewater systems other than at the treatment plants and were not connected with rain or snowmelt. Here’s the breakdown:
5,262 to 12,600 gallons spilled from 13 incidents reported on Sewer Mains caused by Mechanical Equipment Failure (1 incident) Sewer Line Blockage – Other (4 incidents) or Unknown (8 incidences)
111,731 to 628,650 gallons spilled from 32 spills from Manholes caused by Mechanical Equipment Failure (2 spills), Sewer Line Blockage – Grease (14 spills), Sewer Line Blockage – Other (11 spills), Sewer Line Blockage – Roots (3 spills), Unknown (2 spills).
A 5-million gallon spill from the Waterbury wastewater treatment plant on October 9 made headlines and prompted calls for major improvements in the utility’s emergency response plan. (Click here for that story.)
But the Metropolitan District Commission (MDC) in Hartford put up much more impressive numbers in October. On October 29th and 30th, the overflow of sewage in the MDC Hartford system was 94 million gallons (!) into the three Park River drainage districts; it was 27 million gallons elsewhere in the system. In the MDC West Hartford system, on the same two days, sewage bypasses delivered 1 million gallons into Piper Brook and 1.37 million gallons into Trout Brook.
Note, MDC Combined Sewage Overflows are common, and this utility declines to file its reports electronically, preferring the older paper filing (and less timely public notice). MDC is building a giant tunnel and holding tank system it calls The Clean Water Project to address the problems that occur when it rains in Hartford.
Want the raw (sewage) data? Click the following links for:
Sewage in our rivers has been in the news recently because of the big spills in October, especially from the Waterbury system and from the Metropolitan District Commission systems in Hartford and West Hartford. These events are more common than most people realize. They average about one a day, but they cluster around heavy rainfalls and around a minority of plants. Still, annual totals run to hundreds of millions of gallons of untreated or partially treated sewage going into state waters each year.
Following passage of a Sewage Right to Know law in 2012, the CT Department of Energy and Environmental Protection (DEEP) has taken several steps to try to post online more-timely information for the public. Unfortunately, the maps and data are confusing to access and are often incomplete or incorrect. DEEP is working daily to improve this reporting. Some matters are beyond their control. For example, the DEEP website postings only use data reported electronically. But a significant number of treatment plants do not report electronically. Most notable are plants owned by the Metropolitan District Commission, the giant Hartford area utility (see our report above).
We at Rivers Alliance will be happy to answer questions you may have. Here follows some basic information on state reporting of sewage spills. But if you can’t find what you want or the answer looks off-target, calls us at 860-361-9349; ask for Tony.
Types of sewage spills:
DEEP lists spills of untreated sewage into our state's waters under two categories: "Bypass Events" and "Combined Sewer Overflows (CSOs)." At the DEEP website, both categories must be searched for total spill volumes because DEEP rarely combines the lists.
Connecticut has been working with considerable success to eliminate CSOs, but several large cities still have them.
Bypass Events are basically spills of any kind other than those happening through a CSO structure. A bypass spill usually happens when a wastewater control facility directs sewage past its treatment system directly into a receiving water. The reason for the bypass may be a problem with the plant operation. Often, however, the reason for the bypass is flawed old infrastructure that allows stormwater to infiltrate the wastewater pipes and pumping systems. For example, a heavy rainfall into saturated ground will force water into any leaky pipe that is in the ground; water can also enter through cracked or ill-fitted manhole covers. As a result, more water arrives at pump stations and treatment plants than the equipment can handle. Leaks elsewhere in the sanitary sewer system also get listed as Bypass Events.
A completely tight, non-CSO system should not be affected by stormwater and should not have routine bypass events.
This page has two tabs. One is supposed to show only “active” events, that, is recent spills. This map is somewhat useful but presently incomplete because for various reason data reports may not reach the site and because the MDC and a few other utilities do not report their data electronically. Also, some old events may still be listed. Click here for a list of utilities that DO report their spills electronically.
The second tab is for all events since the site was launched. It is potentially useful to study individual facilities and for similar research. But it is complicated, with glitches; it is also incomplete because many treatment plants to not file reports electronically yet. If you have difficulty finding what you are looking for, contact Ann Straut at DEEP (email@example.com) or Tony Mitchell at Rivers Alliance (firstname.lastname@example.org).
Rivers Alliance Executive Director Margaret Miner was recently interviewed (and photographed) for an investigative story in the Republican-American newspaper that appeared as the front page top headline on Sunday, Nov 19, 2017. Click here for the article summary on their website. Reading the full article may require a subscription to their newspaper.
The Republican-American has been dogged in their pursuit of information regarding Waterbury's regional treatment facility, which treats wastewater from several surrounding towns and accepts sewage sludge from a large portion of the state. Details of the 5 million gallon spill was available in the print version of the paper long before there was any public notice by government agencies.
As part of the Republican-American's investigations, they looked the state's website for reporting sewage overflows for others that have occurred in the area. Rivers Alliance was contacted regarding 9 Bantam River sewage events in Litchfield that spilled an estimated 1,450,058 to 2,300,500 gallons of untreated sewage from April through October, plus an unknown amount during a five-day problem in May. See below for our guide to using the state's webpage to search for reported sewage spills.
A search for "sewage" on the Republican-American website reveals their comprehensive coverage.
Reading these articles may require a subscription to the newspaper.
Consent Order CO WRMU 17003 was issued to the City of Waterbury by the state Department of Energy and Environmental Protection (DEEP) that specifies a cleanup schedule, procedures to implement in the future, restocking of fish in the river, and
"On or before May 12, 2018, the Respondent shall, in coordination with the Fisheries Division of the CT DEEP, sponsor a family fishing day along the Naugatuck River"
Five-Million-Gallon Sewage Spill in Naugatuck River
Recent rains have increased flow in the Naugatuck River, but bacteria levels are not expected to fall by much because runoff itself contributes bacteria to rivers and streams. Bacteria levels are often high for 48 hours after heavy rain, and some parts of the Naugatuck River watershed north of Waterbury received over two inches of rain Oct 24-25.
On October 9, Waterbury's wastewater treatment plant lost power resulting in a release of untreated and partially treated sewage into the river. This major spill (into a low-flowing river) received little attention. The Waterbury Republican-American newspaper has been reporting the problem regularly, but the best non-subscription news source we have found so far is an article from the Waterbury Observer Oct 23. Best Facebook coverage so far is from the Naugatuck River Revival Group and Waterbury Observer. On October 20, the Department of Energy and Environmental Protection (DEEP) advised us that bacteria counts were still high, and people should avoid contact with the river water.
Here's what has been reported. On Monday, October 9, a live wire was cut in a construction site at the City of Waterbury's wastewater treatment plant, which caused the entire plant to lose power. The company that cut the wire could not work on restoring power while plant mangers were trying to start the backup generator. The Waterbury-Republican article stated that "hours later" the plant had to start putting untreated sewage into the Naugatuck River at a rate of 1 million gallons per hour until power was restored five hours later. The article further stated that on Wednesday, Oct 11, DEEP reported it did not know why dozens of fish turned up dead downstream of the treatment plant, in the City of Naugatuck. On October 13, Waterbury's Public Health Department put up three signs advising no swimming or other contact with river water after tests showed elevated bacteria levels. On October 18, additional tests showed bacteria levels remained high.
Kevin Zak of the Naugatuck River Revival Group reported to Rivers Alliance on October 23 that two of the signs were damaged. Rivers Alliance estimated that on October 9, the day of the spill, the flow in the river below the treatment plant was approximately 30 to 40 percent sewage.